[ {"q":"G01指令的功能是什么？","opt":["A.直线插补切削","B.程序结束","C.主轴正转","D.快速定位"],"ans":"A","tip":"G01是直线插补指令，刀具以F代码指定的进给速度沿直线移动到目标位置，是数控加工中最基础的切削指令。","cate":"程序代码"}, {"q":"执行G01 X100 Y100 F200时，F200的含义是？","opt":["A.刀具号200","B.暂停200秒","C.主轴转速200r/min","D.进给速度200mm/min"],"ans":"D","tip":"F代码用于指定进给速度，在G01模式下，F200表示刀具每分钟移动200毫米，单位是mm/min。","cate":"程序代码"}, {"q":"M01指令在什么情况下才会生效？","opt":["A.面板“选择停止”开关打开时","B.出现报警时","C.任何时候","D.程序结束时"],"ans":"A","tip":"M01是选择性暂停指令，只有操作面板上的“选择停止”按键指示灯亮起时，程序才会在M01处暂停。","cate":"程序代码"}, {"q":"G00和G01的主要区别是什么？","opt":["A.两者完全一样","B.G00是快速定位，G01是切削进给","C.G00有进给速度，G01没有","D.G00用于切削，G01用于空跑"],"ans":"B","tip":"G00是快速定位指令，机床以最快速度移动，不进行切削；G01是直线切削指令，移动速度由F值决定。","cate":"程序代码"}, {"q":"M03指令控制主轴的什么动作？","opt":["A.主轴反转","B.主轴定向","C.主轴停止","D.主轴正转"],"ans":"D","tip":"M03是主轴正转指令（顺时针旋转），通常与S代码配合使用来设定转速，如M03 S1000。","cate":"程序代码"}, {"q":"G21指令设定的单位是什么？","opt":["A.毫米","B.弧度","C.英寸","D.度"],"ans":"A","tip":"G21是公制输入指令，设定程序中的所有坐标值（如X、Y、Z）和进给速度单位为毫米（mm），是国内的默认标准。","cate":"程序代码"}, {"q":"M05指令的作用是什么？","opt":["A.主轴正转","B.主轴定向","C.主轴停止","D.主轴加速"],"ans":"C","tip":"M05用于停止主轴旋转。通常在换刀（M06）或程序结束（M30）前，必须先执行M05确保主轴停转以保证安全。","cate":"程序代码"}, {"q":"G90指令代表哪种编程方式？","opt":["A.圆柱坐标编程","B.极坐标编程","C.增量坐标编程","D.绝对坐标编程"],"ans":"D","tip":"G90是绝对坐标编程模式，在此模式下，所有坐标值都是相对于工件坐标系原点（G54等）的距离，编程直观不易出错。","cate":"程序代码"}, {"q":"X轴和Y轴通常用于定义哪个平面？","opt":["A.垂直面","B.水平面（XY平面）","C.端面平面","D.侧面平面"],"ans":"B","tip":"在数控铣床中，X轴和Y轴定义了水平的工作台平面（G17平面），Z轴通常是垂直于工作台的上下移动轴。","cate":"程序代码"}, {"q":"M08指令的功能是什么？","opt":["A.开启液态切削液","B.开启雾状冷却","C.关闭切削液","D.吹气"],"ans":"A","tip":"M08是开启液态切削液（冷却液）的指令，用于降低切削温度和冲走铁屑，是加工中必不可少的辅助功能。","cate":"程序代码"}, {"q":"G91指令的含义是？","opt":["A.半径补偿","B.固定循环","C.绝对坐标","D.增量坐标"],"ans":"D","tip":"G91是增量坐标编程模式，在此模式下，坐标值表示刀具从上一个位置移动了多少距离，而不是相对于原点的位置。","cate":"程序代码"}, {"q":"执行G91 G01 X10 F100后，刀具向哪里移动？","opt":["A.向X正方向移动10mm","B.移动到X10的位置","C.向X负方向移动10mm","D.回到原点"],"ans":"A","tip":"在G91增量模式下，X10表示刀具沿着X轴正方向（向右）移动10毫米，移动速度由F100控制。","cate":"程序代码"}, {"q":"M00指令的作用是什么？","opt":["A.选择性暂停","B.无条件暂停","C.程序结束","D.主轴换档"],"ans":"B","tip":"M00是程序无条件暂停指令。执行到M00时，机床所有动作（主轴、进给、冷却）都会停止，按“循环启动”后继续执行。","cate":"程序代码"}, {"q":"G40指令用来做什么？","opt":["A.取消半径补偿","B.开启半径补偿","C.取消长度补偿","D.开启长度补偿"],"ans":"A","tip":"G40用于取消刀具半径补偿（G41/G42）。为了防止过切，通常在加工轮廓结束后，用G40在直线段取消补偿。","cate":"程序代码"}, {"q":"S代码在程序中的作用是什么？","opt":["A.指定暂停时间","B.指定进给速度","C.指定主轴转速","D.指定刀具号"],"ans":"C","tip":"S代码用于指定主轴的转速。在G97模式下，S1000表示主轴转速为1000转/分钟（r/min）。","cate":"程序代码"}, {"q":"M06指令通常与什么代码配合完成换刀？","opt":["A.S代码（转速）","B.T代码（刀具号）","C.R代码（半径）","D.F代码（进给）"],"ans":"B","tip":"M06是自动换刀指令，通常与T代码成对出现。例如T02 M06表示先将2号刀选到刀库中，然后执行换刀动作。","cate":"程序代码"}, {"q":"G54指令属于什么类型的坐标系？","opt":["A.机床坐标系","B.局部坐标系","C.临时坐标系","D.工件坐标系"],"ans":"D","tip":"G54是常用的工件坐标系（Work Coordinate System）。我们通过对刀仪或分中棒，将工件的原点偏置数据存入G54，程序以此为基础加工。","cate":"程序代码"}, {"q":"M09指令的功能是什么？","opt":["A.关闭切削液","B.开启主轴","C.开启雾状冷却","D.开启液态冷却"],"ans":"A","tip":"M09用于关闭切削液。通常在程序结束（M30）前或需要短暂停止冷却时使用，防止冷却液飞溅。","cate":"程序代码"}, {"q":"G02指令代表什么方向的圆弧？","opt":["A.逆时针圆弧","B.顺时针圆弧","C.快速移动","D.直线"],"ans":"B","tip":"G02是顺时针圆弧插补指令。判断顺逆方向时，要沿着垂直于圆弧平面的坐标轴（通常是Z轴）向负方向看。","cate":"程序代码"}, {"q":"I、J、K在圆弧指令中表示什么？","opt":["A.进给速度","B.半径值","C.圆心相对于起点的增量","D.终点坐标"],"ans":"C","tip":"在G02/G03圆弧指令中，I、J、K分别表示圆心在X、Y、Z轴上相对于圆弧起点的增量值。例如I10表示圆心在X方向比起点大10mm。","cate":"程序代码"}, {"q":"G03指令代表什么方向的圆弧？","opt":["A.逆时针圆弧","B.直线","C.顺时针圆弧","D.暂停"],"ans":"A","tip":"G03是逆时针圆弧插补指令。与G02相反，它用于加工逆时针走向的圆弧轮廓或圆弧槽。","cate":"程序代码"}, {"q":"M30与M02的主要区别是什么？","opt":["A.两者没有区别","B.M30不能关冷却","C.M30结束后光标返回程序开头","D.M30不关主轴"],"ans":"C","tip":"M30是程序结束并复位指令，它不仅停止机床，还会将程序光标跳回第一行，非常适合批量加工；而M02只是结束，光标停在末尾。","cate":"程序代码"}, {"q":"G43指令的功能是什么？","opt":["A.取消长度补偿","B.刀具半径补偿","C.镜像","D.刀具长度正补偿"],"ans":"D","tip":"G43是刀具长度正补偿。它配合H代码使用，如G43 H01 Z100.，系统会自动加上H01寄存器里的长度值，确保Z轴到达正确的深度。","cate":"程序代码"}, {"q":"H代码通常用来指定什么？","opt":["A.刀具长度补偿号","B.刀具半径补偿号","C.进给速度","D.主轴转速"],"ans":"A","tip":"H代码用于调用刀具长度补偿寄存器。例如H01调用1号寄存器的长度值。注意：有的系统也用H指定半径，但主流是用D指半径，H指长度。","cate":"程序代码"}, {"q":"G49指令的作用是什么？","opt":["A.开启长度补偿","B.取消半径补偿","C.取消刀具长度补偿","D.开启半径补偿"],"ans":"C","tip":"G49用于取消刀具长度补偿（G43/G44）。通常在加工完成后，返回安全高度后使用，以防止后续程序误调用补偿值。","cate":"程序代码"}, {"q":"G80指令的功能是什么？","opt":["A.取消固定循环","B.取消镜像","C.开启镗孔循环","D.开启钻孔循环"],"ans":"A","tip":"G80用于取消固定循环（如钻孔、攻丝、镗孔循环）。执行完孔加工后，必须用G80取消模态，否则机床可能误动作。","cate":"程序代码"}, {"q":"G81是最基础的什么循环？","opt":["A.深孔钻循环","B.定点钻孔循环","C.攻丝循环","D.精镗循环"],"ans":"B","tip":"G81是简单钻孔循环，动作流程为：快速定位（G00）→ 钻孔（G01）→ 快速退回（G00）。适合加工通孔或浅孔。","cate":"程序代码"}, {"q":"G83指令适合加工什么类型的孔？","opt":["A.深孔","B.阶梯孔","C.沉头孔","D.浅孔"],"ans":"A","tip":"G83是深孔钻削循环，采用断屑排屑的方式（啄钻），每次钻一定深度就后退排屑，防止切屑堵塞烧伤钻头，专门用于深孔加工。","cate":"程序代码"}, {"q":"M19指令的作用是什么？","opt":["A.主轴换档","B.尾座前进","C.主轴定向停止","D.卡盘夹紧"],"ans":"C","tip":"M19是主轴定向指令。它使主轴停止在一个固定的角度（准停），通常用于加工中心自动换刀时，确保主轴端面的键槽对准机械手，或者进行背镗加工。","cate":"程序代码"}, {"q":"G84指令用于什么加工？","opt":["A.钻孔","B.刚性攻丝","C.铰孔","D.镗孔"],"ans":"B","tip":"G84是右旋攻丝循环。主轴正转攻入，到达底部后主轴反转，退出孔外。F值必须等于螺距（如M10×1.5，F1.5）。","cate":"程序代码"}, {"q":"D代码在数控铣中通常代表什么？","opt":["A.子程序号","B.刀具长度补偿号","C.循环次数","D.刀具半径补偿号"],"ans":"D","tip":"D代码用于调用刀具半径补偿寄存器。例如G41 D01表示建立左补偿，并使用1号寄存器里存储的刀具半径值来计算路径。","cate":"程序代码"}, {"q":"G41是刀具半径的哪一侧补偿？","opt":["A.右侧补偿","B.取消补偿","C.左侧补偿","D.长度补偿"],"ans":"C","tip":"G41是刀具半径左补偿。判断方法：沿着刀具进给方向看，刀具在工件轮廓的左侧。常用于加工外形或内腔的逆时针轮廓。","cate":"程序代码"}, {"q":"G42是刀具半径的哪一侧补偿？","opt":["A.左侧补偿","B.取消补偿","C.长度补偿","D.右侧补偿"],"ans":"D","tip":"G42是刀具半径右补偿。判断方法：沿着刀具进给方向看，刀具在工件轮廓的右侧。常用于加工外形或内腔的顺时针轮廓。","cate":"程序代码"}, {"q":"G28指令的作用是什么？","opt":["A.开启镜像","B.回到机床参考点（回零）","C.关闭冷却","D.回到工件原点"],"ans":"B","tip":"G28是返回参考点指令。通常写成G28 Z0，意思是刀具先抬到Z0的安全高度，然后再回到机床的Z轴参考点（机械原点）。","cate":"程序代码"}, {"q":"在G代码中，X、Y、Z代表什么轴？","opt":["A.虚拟轴","B.辅助轴","C.旋转轴","D.直线轴"],"ans":"D","tip":"X、Y、Z是数控机床的三个基本直线移动坐标轴。在立式铣床上，Z轴通常是主轴上下移动的方向，XY是工作台平面移动方向。","cate":"程序代码"}, {"q":"G16指令的功能是什么？","opt":["A.开启极坐标编程","B.取消极坐标编程","C.开启坐标系旋转","D.开启镜像功能"],"ans":"A","tip":"G16是极坐标编程开启指令，配合G17平面使用，用半径和角度标注坐标，常用于加工中心加工圆周均布的孔系，大幅简化编程。","cate":"程序代码"}, {"q":"G04指令的功能是什么？","opt":["A.暂停（延时）","B.镜像","C.快速移动","D.缩放"],"ans":"A","tip":"G04是暂停指令（Dwell），让刀具在当前位置停留一段时间。常用于钻孔到底部时光整孔底，或铣削轮廓转角时让刀。","cate":"程序代码"}, {"q":"G04 X2.0表示暂停多久？","opt":["A.2毫秒","B.2转","C.2秒","D.2分钟"],"ans":"C","tip":"在使用X地址指定时间时，单位通常是秒。G04 X2.0表示刀具暂停2秒钟。如果用P指定，P2000表示2000毫秒（也是2秒）。","cate":"程序代码"}, {"q":"G17指令选择了哪个加工平面？","opt":["A.YZ平面","B.XY平面","C.UV平面","D.XZ平面"],"ans":"B","tip":"G17选择XY平面（默认平面）。绝大多数立式数控铣床和加工中心的圆弧插补（G02/G03）都必须在G17平面内进行。","cate":"程序代码"}, {"q":"M98指令的主要功能是什么？","opt":["A.子程序结束返回","B.调用子程序","C.程序结束复位","D.主轴定向准停"],"ans":"B","tip":"M98是调用子程序指令，格式如M98 P1000 L2，表示调用O1000号子程序2次，适合加工中心重复轮廓加工，有效简化程序篇幅。","cate":"程序代码"}, {"q":"G19指令选择了哪个平面？","opt":["A.XY平面","B.XZ平面","C.球面","D.YZ平面"],"ans":"D","tip":"G19选择YZ平面。这在某些龙门铣床或四轴、五轴加工中，当刀具沿Y和Z轴插补运动时使用。","cate":"程序代码"}, {"q":"M07指令与M08的区别是什么？","opt":["A.M07是雾状冷却，M08是液态冷却","B.没有区别","C.M07是液态，M08是雾状","D.M07是吹气，M08是冷却"],"ans":"A","tip":"M07开启雾状切削液（Mist Coolant），适合微量润滑或难加工材料；M08开启液态切削液（Flood Coolant），是常规的大流量水冷。","cate":"程序代码"}, {"q":"G15指令的功能是什么？","opt":["A.开启极坐标编程","B.取消极坐标编程","C.开启镜像功能","D.取消坐标系旋转"],"ans":"B","tip":"G15是极坐标取消指令，与G16配对使用。极坐标加工完成后需用G15取消，恢复正常直角坐标编程模式，避免后续程序出错。","cate":"程序代码"}, {"q":"G97指令代表什么控制模式？","opt":["A.刚性攻丝","B.恒转速控制","C.恒线速控制","D.同步控制"],"ans":"B","tip":"G97是恒转速控制模式，单位r/min。这是默认的转速模式，主轴以固定的转速旋转，不受工件直径变化影响。","cate":"程序代码"}, {"q":"M13指令组合了哪两个动作？","opt":["A.换刀+冷却液开","B.主轴正转+主轴反转","C.主轴反转+冷却液开","D.主轴正转+冷却液开"],"ans":"D","tip":"M13是一个复合M代码，等效于同时执行M03（主轴正转）和M08（冷却液开）。它能简化程序，减少代码行数。","cate":"程序代码"}, {"q":"M99指令在子程序中的作用是？","opt":["A.暂停子程序执行","B.结束子程序并返回主程序","C.调用下一级子程序","D.复位整个程序"],"ans":"B","tip":"M99是子程序结束指令，执行后程序返回主程序中M98的下一行继续运行，是加工中心子程序编程的必备结束代码。","cate":"程序代码"}, {"q":"G98在固定循环中控制什么？","opt":["A.返回R点","B.主轴转速","C.进给速度","D.返回初始平面"],"ans":"D","tip":"G98是固定循环中的返回平面设定。当钻孔或攻丝完成后，刀具会返回到循环开始前设定的初始安全高度（Initial Level）。","cate":"程序代码"}, {"q":"G99在固定循环中控制什么？","opt":["A.返回R点（参考平面）","B.返回工件原点","C.返回机械原点","D.返回初始平面"],"ans":"A","tip":"G99是固定循环中的返回平面设定。孔加工完成后，刀具返回到R点（通常离工件表面较近的安全高度），这样可以缩短空行程时间，提高效率。","cate":"程序代码"}, {"q":"G41建立半径补偿时，移动距离必须大于什么？","opt":["A.步距","B.工件厚度","C.刀具直径","D.刀具半径"],"ans":"D","tip":"建立刀具半径补偿（G41/G42）时，刀具的移动距离必须大于刀具半径值。如果距离过短，系统无法计算出偏移矢量，会触发报警或导致过切。","cate":"程序代码"}, {"q":"M06 T01的正确执行逻辑通常是？","opt":["A.先选1号刀，再执行换刀","B.先换1号刀，再选1号刀","C.只换刀不选中","D.只选中不换刀"],"ans":"A","tip":"标准的换刀流程是T代码预选刀，M06执行换刀。T01 M06的意思是：将1号刀准备到换刀位置，然后执行换刀动作，把主轴上的刀换成1号刀。","cate":"程序代码"}, {"q":"在G92 X0 Y0 Z0之后，当前点被定义为什么？","opt":["A.安全点","B.参考点","C.机床原点","D.工件原点"],"ans":"D","tip":"G92是设定工件坐标系的指令。执行G92 X0 Y0 Z0后，系统会将当前刀具所在的位置强制定义为工件坐标系的原点（X0,Y0,Z0）。","cate":"程序代码"}, {"q":"G51指令的功能是什么？","opt":["A.取消比例缩放","B.开启比例缩放","C.开启镜像功能","D.开启坐标系旋转"],"ans":"B","tip":"G51是比例缩放开启指令，可指定缩放中心和比例系数，用于加工中心相似轮廓的等比例放大缩小加工，减少重复编程。","cate":"程序代码"}, {"q":"G43 H01 Z100.0中，Z100.0指的是什么？","opt":["A.刀具长度值","B.补偿前的原始坐标","C.补偿后的目标位置","D.安全距离"],"ans":"C","tip":"在G43 H01 Z100.0中，Z100.0是应用长度补偿后的目标位置。实际机床移动到的机械坐标 = Z100.0 + H01寄存器中的长度值。","cate":"程序代码"}, {"q":"M30执行后，光标会回到哪里？","opt":["A.程序开头","B.程序末尾","C.程序中间","D.随机位置"],"ans":"A","tip":"M30（Program End and Reset）不仅结束了程序的执行，还会将程序指针复位到程序的第一行，方便下次直接启动加工。","cate":"程序代码"}, {"q":"G94指令设定的进给模式是什么？","opt":["A.每齿进给","B.恒进给","C.每分钟进给","D.每转进给"],"ans":"C","tip":"G94是每分钟进给模式（Feed per Minute），F值单位为mm/min。这是铣削加工中最常用的进给模式。","cate":"程序代码"}, {"q":"G86指令属于哪种加工循环？","opt":["A.精镗循环","B.粗镗循环","C.刚性攻丝循环","D.深孔钻削循环"],"ans":"B","tip":"G86是粗镗循环，镗到孔底后主轴停止，快速退刀，加工效率高但退刀易划伤孔壁，是加工中心粗镗孔工序的常用指令。","cate":"程序代码"}, {"q":"M01选择性暂停主要用在什么场合？","opt":["A.换刀","B.程序结束","C.紧急停止","D.调试或抽检"],"ans":"D","tip":"M01用于程序调试或中间抽检。操作员打开“选择停止”开关，程序就会在M01处停下，检查尺寸合格后按启动键继续，关闭开关则跳过该指令。","cate":"程序代码"}, {"q":"G53指令有什么特点？","opt":["A.开启镜像","B.选择机床坐标系","C.取消缩放","D.选择工件坐标系"],"ans":"B","tip":"G53是非模态指令，它允许程序直接使用机床坐标系（Machine Coordinate System）移动。常用于换刀前将主轴移动到绝对的换刀点位置。","cate":"程序代码"}, {"q":"在圆弧指令G02/G03中，R值代表什么？","opt":["A.圆弧半径","B.进给率","C.转速","D.暂停时间"],"ans":"A","tip":"R地址用于指定圆弧的半径值。例如G02 X100 Y0 R50表示从当前点顺时针画一个半径为50mm的圆弧到X100 Y0。","cate":"程序代码"}, {"q":"使用R编写整圆程序可以吗？","opt":["A.视系统而定","B.可以","C.不可以，只能用IJK","D.只能用R"],"ans":"C","tip":"不可以使用R地址编写整圆程序。因为R值只能描述180度以内的圆弧，整圆（360度）必须使用I、J、K（圆心增量）的方式来编程。","cate":"程序代码"}, {"q":"固定循环中，Z值通常代表什么？","opt":["A.初始平面高度","B.R点平面高度","C.孔底加工深度","D.安全高度"],"ans":"C","tip":"在G81/G83等固定循环中，Z值指定孔底的Z轴坐标，代表最终钻孔或镗孔的加工深度，是固定循环的核心参数之一。","cate":"程序代码"}, {"q":"G76精镗循环中，Q参数通常表示什么？","opt":["A.主轴转速","B.进给速度","C.每次切深","D.孔底让刀量"],"ans":"D","tip":"G76是精镗循环。Q值设定主轴定向后的让刀偏移量。当镗刀到达孔底，主轴准停，刀具会向指定方向偏移Q值，然后退刀，防止划伤孔壁。","cate":"程序代码"}, {"q":"M41指令通常用于什么操作？","opt":["A.主轴低速档","B.卡盘松开","C.主轴高速档","D.冷却液开"],"ans":"A","tip":"M41/M42等指令用于控制主轴齿轮箱换挡。M41通常是低速档，提供较大的输出扭矩，适合重切削或大直径工件加工。","cate":"程序代码"}, {"q":"G44指令的功能是什么？","opt":["A.长度正补偿","B.半径补偿","C.取消补偿","D.长度负补偿"],"ans":"D","tip":"G44是刀具长度负补偿。它与G43方向相反，实际Z坐标 = 编程Z坐标 - H代码中的补偿值。目前大多数现代机床较少使用G44，主要使用G43。","cate":"程序代码"}, {"q":"M08和M09的关系是什么？","opt":["A.互锁关系","B.没有关系","C.同时开启","D.同时关闭"],"ans":"A","tip":"M08（开冷却）和M09（关冷却）是一对互锁指令。开启M08后，必须执行M09才能关闭，反之亦然。","cate":"程序代码"}, {"q":"G28回零指令中，加工中心通常先回哪个轴？","opt":["A.X轴","B.Y轴","C.Z轴","D.三轴同时回"],"ans":"C","tip":"G28返回参考点时，通常先执行Z轴回零，将刀具抬到安全高度，避免刀具与工件或夹具碰撞，是加工中心安全操作的基本规范。","cate":"程序代码"}, {"q":"M30执行后，主轴和冷却液的状态是？","opt":["A.随机状态","B.仅主轴停止","C.自动停止","D.保持运行"],"ans":"C","tip":"M30程序结束指令具有模态取消功能，执行后，主轴会自动停止旋转（M05），切削液会自动关闭（M09），光标返回程序头。","cate":"程序代码"}, {"q":"G04 P1500表示暂停多长时间？","opt":["A.15秒","B.1500秒","C.150秒","D.1.5秒"],"ans":"D","tip":"G04 P_的单位通常是毫秒（ms）。P1500表示暂停1500毫秒，换算成秒就是1.5秒。这在孔底光整或倒角时非常常用。","cate":"程序代码"}, {"q":"G92设定坐标系后，断电重启会怎样？","opt":["A.变成G54","B.失效，需要重新设定","C.自动保存","D.机床报警"],"ans":"B","tip":"G92设定的是临时坐标系（也称为浮动坐标系）。一旦机床断电或复位，G92的设定值就会丢失，再次开机时需要重新对刀或使用G54等永久偏置。","cate":"程序代码"}, {"q":"在数控编程中，N字代表什么？","opt":["A.刀具号","B.转速","C.程序段号","D.行数统计"],"ans":"C","tip":"N字是程序段号（Sequence Number），如N10、N20。它主要用于方便阅读程序和跳转（如调用子程序），对机床运动轨迹没有直接影响。","cate":"程序代码"}, {"q":"G27指令的功能是什么？","opt":["A.开启镜像","B.设定局部坐标系","C.从参考点返回","D.返回参考点检查"],"ans":"D","tip":"G27用于校验刀具是否已经回到了参考点。如果刀具没有准确到达机械原点，系统会触发报警，这常用于换刀前的安全确认。","cate":"程序代码"}, {"q":"G29指令通常与哪个指令配对使用？","opt":["A.G00","B.G28","C.G01","D.G54"],"ans":"B","tip":"G29是从参考点返回指令，它必须配合G28使用。执行流程通常是：G28回零 -> 执行其他动作 -> G29返回目标点。","cate":"程序代码"}, {"q":"M07和M08可以同时开启吗？","opt":["A.取决于天气","B.绝对不行","C.会报警","D.可以，增强冷却"],"ans":"D","tip":"在支持双冷却泵的机床上，M07（雾状）和M08（液态）可以同时开启，形成混合冷却效果，特别适合加工钛合金、高温合金等难加工材料。","cate":"程序代码"}, {"q":"G61指令代表什么模式？","opt":["A.精确停止模式","B.连续路径模式","C.高速高精模式","D.仿真模式"],"ans":"A","tip":"G61是精确停止模式。在该模式下，刀具每到一程序段结束点都会减速到0，确认到位后再执行下一段，确保拐角处的轮廓精度，常用于精加工。","cate":"程序代码"}, {"q":"G64指令代表什么模式？","opt":["A.单段模式","B.机械锁定","C.连续路径模式","D.精确停止模式"],"ans":"C","tip":"G64是连续路径模式（默认）。系统为了提高效率，允许刀具在程序段转接处不完全减速到0，而是平滑过渡，适合对精度要求不高的粗加工。","cate":"程序代码"}, {"q":"G55指令属于什么类型的坐标系？","opt":["A.机床坐标系","B.局部坐标系","C.工件坐标系","D.增量坐标系"],"ans":"C","tip":"G55是标准工件坐标系之一，同属G54~G59六组工件坐标系，可分别设置不同原点偏置，用于加工中心多工件或多基准加工场景。","cate":"程序代码"}, {"q":"G10指令的主要功能是什么？","opt":["A.开启固定循环","B.可编程数据输入","C.调用宏程序","D.镜像"],"ans":"B","tip":"G10允许在程序运行过程中，直接修改刀具补偿值或工件坐标系偏置值。这常用于自动化生产线上根据测量结果自动修正刀补。","cate":"程序代码"}, {"q":"M19定向的角度是由什么控制的？","opt":["A.S代码","B.H代码","C.T代码","D.系统参数"],"ans":"D","tip":"M19虽然指令本身不带角度参数，但可以通过系统参数（Parameter）来设定主轴定向停止的具体角度，以适应不同的换刀臂位置或背镗需求。","cate":"程序代码"}, {"q":"G68指令的功能是什么？","opt":["A.镜像","B.缩放","C.坐标系旋转","D.极坐标"],"ans":"C","tip":"G68是坐标系旋转指令。它可以让整个工件程序绕着指定的中心点旋转一定的角度（R值），常用于加工斜面上的孔系或轮廓，无需重新计算坐标。","cate":"程序代码"}, {"q":"G51.1指令通常用于什么？","opt":["A.缩放","B.镜像","C.旋转","D.平移"],"ans":"B","tip":"G51.1是镜像指令（又称轴对称）。例如G51.1 X0表示以X=0为对称轴，生成关于Y轴对称的加工路径，常用于加工左右对称的零件。","cate":"程序代码"}, {"q":"G52指令的功能是什么？","opt":["A.设定工件坐标系","B.返回原点","C.设定局部坐标系","D.取消局部坐标系"],"ans":"C","tip":"G52用于设定局部坐标系。它是在当前G54-G59坐标系基础上，再偏移一个值。例如G54 G52 X10 Y10，相当于在G54的原点基础上，把原点移到(10,10)。","cate":"程序代码"}, {"q":"G50在数控铣中有时用来做什么？","opt":["A.取消镜像","B.取消旋转","C.缩放","D.取消缩放比例"],"ans":"D","tip":"在部分铣床系统中，G50与G51配对使用，G51用于缩放比例，G50用于取消缩放比例，恢复1:1的加工状态。","cate":"程序代码"}, {"q":"G18指令选择的是哪个加工平面？","opt":["A.XY平面","B.斜面","C.YZ平面","D.XZ平面"],"ans":"D","tip":"G18用于选择XZ加工平面，在立式加工中心中多用于侧铣头加工或XZ轴联动插补场景，是数控系统三大基础平面选择指令之一，与G17、G19同属平面选择模态组。","cate":"程序代码"}, {"q":"M29指令在加工中心中的主要作用是什么？","opt":["A.自动换刀","B.开启刚性攻丝模式","C.关闭冷却液","D.主轴定向准停"],"ans":"B","tip":"M29是刚性攻丝准备指令，执行后主轴转速与进给轴严格同步，配合G84攻丝循环可实现高精度刚性攻丝，避免攻丝过程中烂牙或丝锥折断，是孔加工常用辅助指令。","cate":"程序代码"}, {"q":"G83深孔钻循环中，Q参数代表什么含义？","opt":["A.每次钻削深度","B.孔底让刀量","C.主轴转速","D.进给速度"],"ans":"A","tip":"G83深孔钻循环中，Q值指定每次啄钻的切削深度，刀具每钻削Q值深度就会后退排屑，通过分次钻削的方式避免切屑堵塞，Q值需根据钻头直径和材料特性合理设置。","cate":"程序代码"}, {"q":"G59指令属于哪种类型的坐标系？","opt":["A.机床坐标系","B.增量坐标系","C.工件坐标系","D.局部坐标系"],"ans":"C","tip":"G59是标准工件坐标系之一，同属于G54~G59六组可预设的工件坐标系，可独立存储原点偏置数据，常用于加工中心多工位夹具或多基准零件的加工编程。","cate":"程序代码"}, {"q":"以下G代码中，属于非模态指令的是？","opt":["A.G00","B.G04","C.G01","D.G41"],"ans":"B","tip":"非模态指令仅在当前程序段生效，执行完成后自动失效。G04暂停指令属于典型的00组非模态G代码，而G00、G01、G41均为模态指令，会持续生效直到被同组指令替换。","cate":"程序代码"}, {"q":"M42指令通常用于控制什么？","opt":["A.冷却液开启","B.主轴低速档","C.主轴高速档","D.卡盘夹紧"],"ans":"C","tip":"M42为主轴齿轮箱高速档位指令，与M41低速档对应，切换到高速档后主轴可输出更高转速，适合小直径刀具精加工、高速铣削等场景，需根据机床参数合理选择档位。","cate":"程序代码"}, {"q":"建立刀具半径补偿（G41/G42）时，必须在什么轨迹中完成？","opt":["A.直线段","B.任意轨迹均可","C.圆弧段","D.螺旋线"],"ans":"A","tip":"建立刀具半径补偿必须在直线移动段中完成，不允许在圆弧插补段启动补偿，否则系统无法正确计算偏移矢量，会触发过切报警或加工轮廓错误，取消补偿同样需在直线段执行。","cate":"程序代码"}, {"q":"G73指令属于哪种加工循环？","opt":["A.刚性攻丝循环","B.沉孔循环","C.高速深孔钻循环","D.精镗循环"],"ans":"C","tip":"G73是高速深孔钻循环，采用断屑式加工，每次钻削后仅小幅后退断屑，排屑量小于G83，空行程更短效率更高，适合加工深度适中、不易缠屑的零件孔位。","cate":"程序代码"}, {"q":"G00快速定位指令的移动轨迹特点是？","opt":["A.速度由F代码决定","B.必须沿工件轮廓移动","C.一定是直线轨迹","D.各轴按最快速度独立移动"],"ans":"D","tip":"G00快速移动时，各坐标轴会以系统设定的最快速度独立运行，不一定走直线轨迹，可能形成折线路径，因此编程时需避开工件与夹具，防止发生碰撞事故。","cate":"程序代码"}, {"q":"M14指令组合了哪两个加工动作？","opt":["A.主轴停止+冷却液关","B.换刀+冷却液开","C.主轴反转+冷却液开","D.主轴正转+冷却液开"],"ans":"C","tip":"M14是复合辅助功能指令，等效于同时执行M04主轴反转和M08冷却液开启，可简化程序代码行数，常用于反向镗孔、左旋攻丝等需要主轴反转的加工场景。","cate":"程序代码"}, {"q":"判断XY平面内G02/G03圆弧顺逆时，正确的观察方向是？","opt":["A.沿X轴正方向看","B.沿Z轴正方向向负方向看","C.沿Z轴负方向向正方向看","D.沿Y轴正方向看"],"ans":"B","tip":"判断XY平面圆弧插补的顺逆方向，需沿着垂直于该平面的Z轴正方向向负方向观察，顺时针轨迹为G02，逆时针轨迹为G03，平面不同对应的观察坐标轴也会相应变化。","cate":"程序代码"}, {"q":"F代码的进给速度设定，对以下哪个指令无效？","opt":["A.G02圆弧插补","B.G81钻孔循环","C.G01直线插补","D.G00快速定位"],"ans":"D","tip":"F代码指定的进给速度仅对切削类插补指令生效，G00快速定位的移动速度由机床系统参数预设，不受F代码控制，仅可通过操作面板的快速倍率旋钮进行调节。","cate":"程序代码"}, {"q":"M98调用子程序指令中，P参数的作用是？","opt":["A.指定子程序号","B.指定暂停时间","C.指定调用次数","D.指定钻深"],"ans":"A","tip":"M98指令中P参数用于指定被调用的子程序程序号，L参数用于指定子程序重复调用次数，例如M98 P1002 L3表示调用O1002号子程序共3次，是子程序编程的核心参数。","cate":"程序代码"}, {"q":"模态G代码的核心特点是什么？","opt":["A.不能与M代码同段","B.持续生效直到被同组指令取消","C.只能使用一次","D.仅当前段生效"],"ans":"B","tip":"模态G代码在一个程序段中指定后，会持续保持生效状态，直到被同组的其他模态指令替换或取消，例如G01、G90、G41等均为模态指令，可大幅简化重复编程。","cate":"程序代码"}, {"q":"G73与G83深孔钻循环的核心区别是什么？","opt":["A.适用孔径不同","B.钻削深度不同","C.排屑后退量不同","D.进给速度不同"],"ans":"C","tip":"G73为高速断屑钻，每次钻削后仅后退微小距离断屑，空行程短效率高；G83为深孔排屑钻，每次钻削后退回R平面完整排屑，排屑更彻底，适合大深度、易缠屑的孔加工。","cate":"程序代码"}, {"q":"M02指令的功能是什么？","opt":["A.程序结束，光标停在末尾","B.暂停程序执行","C.程序结束并返回开头","D.调用子程序"],"ans":"A","tip":"M02是程序结束指令，执行后会停止主轴、进给与冷却液，程序运行结束后光标停留在程序末尾，不会自动返回程序开头，多用于单件加工或程序收尾调试场景。","cate":"程序代码"}, {"q":"刀具长度补偿对应的H寄存器中，存储的内容是？","opt":["A.主轴转速","B.刀具长度偏置值","C.进给速度","D.刀具直径"],"ans":"B","tip":"H编号对应的寄存器中存储的是刀具长度偏置值，包含刀具的实际长度数据与磨损补偿值，G43指令调用对应H号后，系统会自动计算Z轴实际移动坐标，保证加工深度准确。","cate":"程序代码"}, {"q":"数控系统将G代码按组划分的主要依据是什么？","opt":["A.指令难度等级","B.指令使用频率","C.指令字母顺序","D.指令功能与模态特性"],"ans":"D","tip":"G代码按功能和模态特性划分为不同组别，同组内的指令为互斥模态指令，同一程序段内不能同时出现多个同组G代码，否则系统会出现报警或执行逻辑错误。","cate":"程序代码"}, {"q":"M04指令的核心功能是什么？","opt":["A.主轴反转","B.主轴定向","C.主轴正转","D.主轴停止"],"ans":"A","tip":"M04是主轴反转控制指令，通常与S代码配合设定转速，如M04 S800，在加工中心中常用于反向镗孔、左旋螺纹加工等特殊工艺场景，切换转向需在主轴停稳后执行。","cate":"程序代码"}, {"q":"G20指令设定的编程单位是什么？","opt":["A.弧度","B.度","C.英寸","D.毫米"],"ans":"C","tip":"G20是英制输入指令，设定程序中所有坐标值与进给速度的单位为英寸，与G21公制指令同属单位设定模态组，切换后所有尺寸参数均会按对应单位解析。","cate":"程序代码"}, {"q":"取消坐标系旋转功能的G代码是？","opt":["A.G69","B.G50.1","C.G80","D.G68"],"ans":"A","tip":"G69是坐标系旋转取消指令，与G68旋转指令配对使用。完成旋转轮廓加工后必须执行G69取消旋转模式，避免后续加工轨迹受坐标系偏移影响出现尺寸错误。","cate":"程序代码"}, {"q":"G50.1指令的主要功能是什么？","opt":["A.开启比例缩放","B.取消比例缩放","C.开启镜像功能","D.取消可编程镜像"],"ans":"D","tip":"G50.1是可编程镜像取消指令，与G51.1镜像指令成对使用。对称零件加工完成后需用G50.1取消镜像状态，恢复原坐标系方向，防止后续程序路径发生镜像偏移。","cate":"程序代码"}, {"q":"G82钻孔循环相比G81，新增的核心动作是？","opt":["A.主轴反转","B.断屑排屑","C.孔底暂停","D.孔底让刀"],"ans":"C","tip":"G82沉孔锪削循环在G81钻孔流程基础上新增了孔底暂停动作，刀具钻到孔底后停留指定时间光整孔底表面，适合加工沉头孔、锪平面等对孔底平整度有要求的场景。","cate":"程序代码"}, {"q":"G85固定循环主要用于哪种加工场景？","opt":["A.沉孔锪削","B.刚性攻丝","C.深孔钻削","D.铰孔/粗镗"],"ans":"D","tip":"G85是铰孔与粗镗加工循环，进刀与退刀全程以切削进给速度运行，不会在孔底暂停或主轴停转，可有效避免退刀划伤孔壁，是保证孔壁光洁度的基础固定循环。","cate":"程序代码"}, {"q":"数控编程中，T代码的核心作用是什么？","opt":["A.指定进给速度","B.指定补偿号","C.指定刀具号","D.指定主轴转速"],"ans":"C","tip":"T代码是刀具功能代码，用于指定刀具编号，加工中心中通常配合M06换刀指令使用，如T03 M06表示调用3号刀具执行换刀，部分系统中T代码后两位还可关联刀具补偿号。","cate":"程序代码"}, {"q":"固定循环指令中，R参数代表的含义是？","opt":["A.孔底深度","B.每次钻削深度","C.初始平面高度","D.参考平面高度"],"ans":"D","tip":"固定循环中的R参数指定参考平面（R点）的高度，刀具快速移动到该位置后切换为切削进给速度，R点通常设置在工件表面上方2-5mm处，兼顾加工安全与空行程效率。","cate":"程序代码"}, {"q":"子程序调用指令M98中，L参数的作用是？","opt":["A.指定调用次数","B.指定进给速度","C.指定暂停时间","D.指定子程序号"],"ans":"A","tip":"M98指令中L参数用于设置子程序的重复调用次数，省略时默认调用1次，合理设置L参数可大幅简化重复轮廓的加工程序，减少冗余代码提升编程效率。","cate":"程序代码"}, {"q":"数控编程中，准备功能对应的代码字母是？","opt":["A.M","B.F","C.S","D.G"],"ans":"D","tip":"G代码全称准备功能代码，主要用于设定机床的运动模式、坐标系统、补偿功能等加工准备状态，是数控程序中控制刀具运动轨迹最核心的指令类型。","cate":"程序代码"}, {"q":"数控编程中，辅助功能对应的代码字母是？","opt":["A.T","B.M","C.S","D.G"],"ans":"B","tip":"M代码全称辅助功能代码，主要用于控制机床的开关类辅助动作，如主轴启停、冷却开关、换刀控制、程序跳转等，是数控程序逻辑控制的重要组成部分。","cate":"程序代码"}, {"q":"M00与M01指令的核心区别是什么？","opt":["A.两者没有区别","B.M00用于换刀，M01用于程序结束","C.M00无条件暂停，M01需开启选择停止","D.M01无条件暂停，M00需开启选择停止"],"ans":"C","tip":"M00是无条件暂停指令，执行到此处程序必定停止；M01是选择性暂停，仅当操作面板选择停止开关打开时才会生效，常用于批量加工中的抽检环节。","cate":"程序代码"}, {"q":"下列关于G00快速定位指令的描述，正确的是？","opt":["A.移动速度由F代码指定","B.可用于切削加工","C.仅用于空行程快速移动","D.移动路径一定是直线"],"ans":"C","tip":"G00是快速定位指令，仅用于空行程状态下的刀具快速移动，不可参与切削加工，移动速度由机床系统参数设定，不受F代码控制，且移动路径多为折线联动，并非始终走直线，编程时需注意避让夹具与工件。","cate":"程序代码"}, {"q":"G01直线插补指令的核心模态特点是？","opt":["A.不能与F代码同段","B.指定后持续生效直到被同组指令替代","C.仅当前段生效","D.只能单轴移动"],"ans":"B","tip":"G01属于模态G代码，在程序中指定一次后会持续保持生效状态，直到被G00、G02、G03等同组插补指令替代，可大幅减少重复编程，是轮廓加工的基础模态指令。","cate":"程序代码"}, {"q":"在G17 XY平面内正视观察，顺时针圆弧插补对应的指令是？","opt":["A.G02","B.G00","C.G03","D.G01"],"ans":"A","tip":"在G17 XY加工平面内，沿Z轴正方向向负方向正视观察，顺时针走向的圆弧插补使用G02指令，逆时针走向使用G03指令，顺逆判断必须基于对应平面的正视视角，否则轨迹方向会完全相反。","cate":"程序代码"}, {"q":"用于控制主轴顺时针正转的辅助指令是？","opt":["A.M05","B.M06","C.M04","D.M03"],"ans":"D","tip":"M03是主轴正转指令，执行后主轴将按照S代码指定的转速顺时针旋转，是铣削、钻孔等绝大多数加工工序启动主轴的标准指令，必须与转速S值配合使用才会生效。","cate":"程序代码"}, {"q":"M05辅助指令的核心功能是？","opt":["A.主轴停止","B.主轴反转","C.主轴定向","D.主轴正转"],"ans":"A","tip":"M05是主轴停止指令，执行后主轴会从当前转动状态逐步减速直至完全停止，常用于工序切换、换刀前的主轴制动，该指令属于模态指令，执行后主轴保持停止状态直至新的主轴转动指令生效。","cate":"程序代码"}, {"q":"用于关闭所有切削液输出的辅助指令是？","opt":["A.M08","B.M07","C.M13","D.M09"],"ans":"D","tip":"M09是切削液关闭指令，执行后会同时关闭M07雾状冷却与M08液态冷却的输出，常用于工序结束、换刀或程序结束前的冷却系统关停，是通用的冷却停止指令。","cate":"程序代码"}, {"q":"数控加工中心中，指定进给速度的地址字母是？","opt":["A.S","B.T","C.F","D.D"],"ans":"C","tip":"F代码是进给速度指定地址，用于设定G01、G02、G03等切削指令的移动速度，常规单位为mm/min，是控制切削进给快慢、保证加工表面质量与刀具寿命的核心工艺参数。","cate":"程序代码"}, {"q":"G97恒转速模式下，S代码的标准单位是？","opt":["A.mm/r","B.mm/min","C.m/min","D.r/min"],"ans":"D","tip":"在G97主轴恒转速模式下，S代码直接指定主轴的每分钟转速，单位为r/min，该模式是加工中心的默认主轴转速模式，适合绝大多数铣削、钻孔等常规加工场景。","cate":"程序代码"}, {"q":"数控程序中，T代码的核心作用是？","opt":["A.指定转速","B.预选刀具号","C.指定进给","D.调用刀补"],"ans":"B","tip":"T代码是刀具选择地址，后面跟随数字代表对应的刀具号，用于预选刀库中指定编号的刀具到换刀位，需配合M06换刀指令完成最终换刀动作，是自动换刀流程的必要组成部分。","cate":"程序代码"}, {"q":"G54指令对应的坐标系类型是？","opt":["A.第一工件坐标系","B.机床坐标系","C.局部坐标系","D.临时坐标系"],"ans":"A","tip":"G54是系统预设的第一工件坐标系，通过对刀设置原点偏置值后，程序中调用G54即可切换到该坐标系下加工，是加工中最常用的工件坐标系，断电重启后设定值不会丢失。","cate":"程序代码"}, {"q":"立式加工中心上电后的默认加工平面是？","opt":["A.G19 YZ平面","B.无默认平面","C.G17 XY平面","D.G18 XZ平面"],"ans":"C","tip":"G17对应XY加工平面，是立式加工中心系统上电后的默认加工平面，绝大多数铣削、钻孔、圆弧加工都在该平面内执行，也是刀具半径补偿的生效平面。","cate":"程序代码"}, {"q":"G90绝对坐标编程中，所有坐标值的计算基准是？","opt":["A.当前工件坐标系原点","B.当前刀具位置","C.参考点","D.机床原点"],"ans":"A","tip":"G90绝对坐标模式下，程序中编写的所有坐标数值，都以当前生效的工件坐标系原点为基准进行计算，直接对应目标点的绝对位置，编程直观且不易产生累积误差。","cate":"程序代码"}, {"q":"G91增量坐标编程中，坐标值代表的含义是？","opt":["A.相对于工件原点的位置","B.相对于参考点的位置","C.相对于机床原点的位置","D.相对于上一程序段终点的移动量"],"ans":"D","tip":"G91增量坐标模式下，程序中的坐标值代表相对于上一个程序段终点的相对移动量，正值向轴正方向移动，负值向轴负方向移动，适合阵列类特征与相对位移的编程。","cate":"程序代码"}, {"q":"M02程序结束指令的特点是？","opt":["A.仅结束程序不复位光标","B.光标自动返回程序头","C.自动换刀后结束","D.自动执行下一个程序"],"ans":"A","tip":"M02是程序结束指令，执行后会停止主轴、关闭切削液并终止程序运行，但程序光标会停留在当前M02所在行，不会自动复位到程序开头，多用于单次调试类程序的结尾。","cate":"程序代码"}, {"q":"G04暂停指令的典型应用场景是？","opt":["A.换刀等待","B.快速定位缓冲","C.孔底光整停留","D.主轴启动缓冲"],"ans":"C","tip":"G04是暂停延时指令，可让刀具在当前位置停留指定时长，典型应用于钻孔孔底光整、锪孔平面修光、攻丝退刀缓冲等场景，能有效提升加工表面的平整度与质量。","cate":"程序代码"}, {"q":"G28返回参考点指令的最终终点是？","opt":["A.工件原点","B.中间点","C.换刀点","D.机床参考点"],"ans":"D","tip":"G28指令的最终目标是机床参考点也就是机械原点，刀具会先经过程序指定的中间点，再从中间点返回参考点，常用于回零校准、换刀前的基准位置确认。","cate":"程序代码"}, {"q":"M30相比M02，额外具备的核心功能是？","opt":["A.光标复位到程序头","B.停止主轴","C.取消所有模态","D.关闭切削液"],"ans":"A","tip":"M30除了具备M02停止主轴、关闭冷却、终止程序的全部功能外，还会自动将程序光标复位到程序开头位置，按下循环启动即可再次运行程序，非常适合批量零件的循环加工。","cate":"程序代码"}, {"q":"G43指令对应的补偿类型是？","opt":["A.刀具半径负补偿","B.刀具半径正补偿","C.刀具长度正补偿","D.刀具长度负补偿"],"ans":"C","tip":"G43是刀具长度正补偿指令，配合H代码调用对应长度补偿寄存器，可自动叠加刀具长度偏差，保证Z轴加工深度准确，是换刀后必须建立的Z轴补偿功能。","cate":"程序代码"}, {"q":"沿进给方向观察，刀具位于工件轮廓左侧时，应使用的补偿指令是？","opt":["A.G41","B.G40","C.G42","D.G43"],"ans":"A","tip":"G41是刀具半径左补偿指令，判断标准为沿着刀具进给前进方向观察，刀具中心处于工件被加工轮廓的左侧，是铣削外轮廓、型腔常用的半径补偿方式。","cate":"程序代码"}, {"q":"G80指令的核心作用是？","opt":["A.取消刀具半径补偿","B.取消所有固定循环","C.取消坐标系偏置","D.取消刀具长度补偿"],"ans":"B","tip":"G80是固定循环取消指令，执行后会终止所有钻孔、攻丝、镗孔类固定循环模态，使系统恢复到基础插补状态，是固定循环加工结束后必须执行的取消指令。","cate":"程序代码"}, {"q":"M00程序暂停指令的特点是？","opt":["A.仅暂停主轴不暂停进给","B.仅在开关打开时生效","C.无条件停止所有运动","D.自动继续执行后续程序"],"ans":"C","tip":"M00是无条件程序暂停指令，程序运行到该段时会立即停止所有轴运动、主轴转动与切削液输出，必须手动按下循环启动按钮才能继续执行后续程序，用于强制停机检查尺寸或排屑。","cate":"程序代码"}, {"q":"G18指令对应的加工平面是？","opt":["A.YZ平面","B.XZ平面","C.任意平面","D.XY平面"],"ans":"B","tip":"G18对应XZ加工平面，该平面内的圆弧插补、半径补偿均围绕X、Z轴生效，多用于数控车床的常规加工，加工中心侧铣、卧加加工时也会用到该平面设定。","cate":"程序代码"}, {"q":"G09精确停止指令的核心作用是？","opt":["A.单段内到位后再执行下一段","B.取消模态补偿","C.持续保持精准定位","D.暂停程序运行"],"ans":"A","tip":"G09是非模态精确停止指令，仅在当前程序段生效，执行时会让刀具在本程序段终点精准到位并校验位置后，再执行下一段程序，可提升单个拐角的定位精度，不会影响后续程序段。","cate":"程序代码"}, {"q":"沿进给方向观察，刀具位于工件轮廓右侧时，应使用的补偿指令是？","opt":["A.G40","B.G42","C.G44","D.G41"],"ans":"B","tip":"G42是刀具半径右补偿指令，判断标准为沿着刀具进给前进方向观察，刀具中心处于工件被加工轮廓的右侧，需根据加工走刀方向与轮廓侧合理选择补偿方向。","cate":"程序代码"}, {"q":"G44指令对应的补偿类型是？","opt":["A.刀具长度负补偿","B.刀具长度正补偿","C.刀具半径负补偿","D.刀具半径正补偿"],"ans":"A","tip":"G44是刀具长度负补偿指令，配合H代码调用长度补偿寄存器，用于特殊刀具的长度偏差补偿，实际Z轴位置为编程值叠加补偿值，应用场景少于G43正补偿。","cate":"程序代码"}, {"q":"用于开启液态切削液的辅助指令是？","opt":["A.M13","B.M07","C.M08","D.M09"],"ans":"C","tip":"M08是液态切削液开启指令，执行后喷射常规压力的液态冷却液，具备良好的冲屑与冷却效果，是铣削、钻孔等常规加工最常用的冷却开启指令。","cate":"程序代码"}, {"q":"G55指令对应的坐标系是？","opt":["A.局部坐标系","B.第三工件坐标系","C.机床坐标系","D.第二工件坐标系"],"ans":"D","tip":"G55是系统预设的第二工件坐标系，与G54原理一致，通过设置不同的原点偏置值，可实现同一程序内多个工件或多个工位的切换加工，是多工位编程的常用指令。","cate":"程序代码"}, {"q":"G00快速定位指令禁止用于以下哪种场景？","opt":["A.工件切削加工","B.安全高度移动","C.换刀前移动","D.孔位间快速移位"],"ans":"A","tip":"G00移动速度快且轨迹不可控，无稳定进给速度，绝对禁止用于工件切削加工，否则会造成刀具崩断、工件报废甚至机床碰撞，仅可用于无干涉区域的空行程定位。","cate":"程序代码"}, {"q":"G01直线插补的进给速度由哪个参数决定？","opt":["A.S代码","B.机床参数","C.T代码","D.F代码"],"ans":"D","tip":"G01的切削进给速度完全由F代码指定，编程时需根据工件材料、刀具类型、加工余量合理设置F值，进给速度直接影响加工效率、表面质量与刀具使用寿命。","cate":"程序代码"}, {"q":"在G17 XY平面正视观察，逆时针圆弧插补对应的指令是？","opt":["A.G03","B.G04","C.G01","D.G02"],"ans":"A","tip":"在G17 XY平面内，沿Z轴正方向向负方向正视观察，逆时针走向的圆弧插补使用G03指令，顺时针则使用G02指令，顺逆判断必须基于对应平面的正视视角，否则轨迹方向会完全相反。","cate":"程序代码"}, {"q":"关于G00快速移动的路径特点，下列说法正确的是？","opt":["A.多轴同时启动同时停止","B.移动路径由编程者指定","C.始终走直线最短路径","D.各轴独立以最快速度移动"],"ans":"D","tip":"G00快速移动时，各参与轴会独立以系统设定的最快速度移动，并非同时到达终点，因此移动路径多为折线而非直线，编程时必须充分预留安全间隙，避免中途碰撞夹具或工件。","cate":"程序代码"}, {"q":"圆弧插补使用R编程时，R值为负代表什么含义？","opt":["A.圆弧半径小于0","B.反向圆弧插补","C.对应圆心角大于180°的圆弧","D.对应圆心角小于180°的圆弧"],"ans":"C","tip":"圆弧R编程时，R值的正负对应圆弧的圆心角大小：R为正值时对应圆心角小于等于180°的劣弧，R为负值时对应圆心角大于180°的优弧，相同起点、终点与半径下，R正负会生成完全不同的圆弧轨迹。","cate":"程序代码"}, {"q":"G54~G59工件坐标系切换的模态特点是？","opt":["A.必须断电后才能切换","B.仅当前程序段生效","C.切换后永久生效不可更改","D.属于模态指令切换后持续生效"],"ans":"D","tip":"G54~G59均为模态工件坐标系指令，程序中指定一次后会持续生效，直到被其他工件坐标系指令替代，可在同一程序内多次切换，适配多工位、多工件的加工需求。","cate":"程序代码"}, {"q":"G90与G91混合编程时，最容易引发故障的问题是？","opt":["A.转速不匹配","B.刀补号错误","C.坐标基准混淆","D.冷却未开启"],"ans":"C","tip":"G90与G91切换时，坐标计算基准会在绝对位置与相对增量之间切换，若混淆基准会导致坐标值计算完全错误，引发工件过切或碰撞，切换后首个程序段务必确认坐标基准与数值对应。","cate":"程序代码"}, {"q":"G04暂停指令中，地址X与P的核心区别是？","opt":["A.X单位为毫秒，P单位为秒","B.P可带小数点","C.X不可带小数点","D.X单位为秒，P单位为毫秒"],"ans":"D","tip":"G04的两个时间地址单位不同：地址X后接数值单位为秒，支持小数点输入，如X2.0代表暂停2秒；地址P后接数值单位为毫秒，不支持小数点，如P2000代表暂停2秒，使用时不可混淆单位。","cate":"程序代码"}, {"q":"G28返回参考点时设置中间点的主要目的是？","opt":["A.规划安全路径避开干涉","B.减少回零时间","C.缩短移动距离","D.提高回零精度"],"ans":"A","tip":"G28设置中间点的核心作用是规划安全回零路径，让刀具先移动到无干涉的中间位置，再返回参考点，可有效避开夹具、工件凸台、虎钳等障碍物，避免回零过程中发生碰撞事故。","cate":"程序代码"}, {"q":"刀具长度补偿的最佳建立时机是？","opt":["A.任意位置均可","B.安全高度下的Z轴移动过程中","C.切削加工过程中","D.Z轴切入工件过程中"],"ans":"B","tip":"刀具长度补偿必须在安全高度的Z轴空行程移动过程中逐步建立，不可在切入工件的切削过程中建立，否则会因补偿值的突然叠加导致Z轴深度突变，造成工件过切或刀具崩损。","cate":"程序代码"}, {"q":"刀具半径补偿的取消操作应该在什么时候完成？","opt":["A.任意加工段均可","B.切削轮廓的最后一段圆弧上","C.型腔拐角处","D.离开工件后的直线空行程段"],"ans":"D","tip":"刀具半径补偿必须在刀具离开工件轮廓后的直线空行程段取消，严禁在圆弧段或切削段内取消，否则会因补偿值突变导致轨迹畸变，刮伤已加工表面甚至引发过切。","cate":"程序代码"}, {"q":"下列不属于G81钻孔循环动作的是？","opt":["A.快速定位到孔位","B.工进钻削到孔底","C.孔底暂停光整","D.快速退回"],"ans":"C","tip":"G81是基础钻孔循环，动作流程为快速定位孔位、快速下到R点、工进钻削到孔底、快速退回，全程无孔底暂停动作，适合普通浅孔、定点钻加工，对孔底质量要求高的加工需选用其他循环。","cate":"程序代码"}, {"q":"G83深孔钻循环每次钻削后退回R点的主要目的是？","opt":["A.冷却刀具","B.校准刀具","C.测量孔深","D.充分排出切屑"],"ans":"D","tip":"G83深孔钻循环采用间歇进给方式，每钻削指定深度就退回R点，核心目的是将深孔内的切屑充分排出，避免切屑堵塞造成刀具过热、磨损加剧甚至折断，是深孔加工排屑的核心解决方案。","cate":"程序代码"}, {"q":"G85铰孔循环采用工进方式退刀的主要原因是？","opt":["A.减小刀具磨损","B.避免刮伤孔壁","C.提高加工效率","D.降低主轴负载"],"ans":"B","tip":"G85铰孔循环全程采用进给速度工进切入与工进退刀，可避免快速退刀时刀刃与孔壁发生刮擦，保证孔的表面粗糙度与尺寸精度，是铰孔、精镗等精加工孔循环的标准退刀方式。","cate":"程序代码"}, {"q":"加工同一平面内连续排列的多个孔位，优先选用的固定循环返回模式是？","opt":["A.G99返回R点平面","B.两种模式效率一致","C.随机选择","D.G98返回初始平面"],"ans":"A","tip":"加工同一高度平面的连续多孔时，选用G99模式每次加工完仅返回到R点平面，无需回到更高的初始平面，可大幅减少空行程移动距离，显著提升批量钻孔的加工效率。","cate":"程序代码"}, {"q":"固定循环中，R点坐标代表的含义是？","opt":["A.参考点高度","B.孔底深度","C.初始安全高度","D.快速移动与工进的切换点"],"ans":"D","tip":"固定循环中的R点是快速移动与切削进给的切换高度，刀具从初始平面快速移动到R点后，转为F值指定的进给速度进行切削加工，R点高度需高于工件顶面，保证切入前完成速度切换。","cate":"程序代码"}, {"q":"固定循环中的K参数代表的含义是？","opt":["A.重复循环次数","B.退刀量","C.孔底让刀量","D.每次钻削深度"],"ans":"A","tip":"固定循环中的K参数用于指定循环的重复执行次数，常配合G91增量模式使用，可一次性加工等间距排列的多个孔位，能大幅简化阵列孔的编程，减少重复代码量。","cate":"程序代码"}, {"q":"G76精镗循环能够实现让刀动作的前提是？","opt":["A.进给暂停","B.主轴反转","C.主轴停止","D.主轴定向准停"],"ans":"D","tip":"G76精镗循环的让刀动作必须基于主轴定向准停功能，主轴停止在固定周向角度后，刀具才能向指定方向精准偏移，避开刀尖与孔壁的接触，保证退刀时不划伤已加工表面。","cate":"程序代码"}, {"q":"刚性攻丝循环G84中，F值与S值必须满足的关系是？","opt":["A.F = S × 螺纹导程","B.无固定关系","C.F值大于S值","D.S值大于F值"],"ans":"A","tip":"刚性攻丝时，主轴转速S与进给F必须严格匹配公式F = S × 螺纹导程，保证主轴每转一圈，Z轴进给量恰好等于一个导程，否则会出现乱牙、丝锥断裂等问题，是攻丝编程的核心原则。","cate":"程序代码"}, {"q":"下列不属于M19主轴定向应用场景的是？","opt":["A.精镗孔底让刀","B.背镗加工","C.高速铣削","D.自动换刀"],"ans":"C","tip":"M19主轴定向用于让主轴停在固定周向角度，典型应用包括自动换刀对准刀柄键槽、精镗孔底让刀、背镗加工避让刀尖等，高速铣削时主轴需要持续旋转，不需要定向。","cate":"程序代码"}, {"q":"使用G10可编程数据输入修改坐标系的核心优势是？","opt":["A.不会出错","B.无需手动输入实现自动调整","C.修改精度更高","D.修改范围更大"],"ans":"B","tip":"G10可在程序运行过程中自动修改工件坐标系偏置与刀具补偿值，无需操作人员手动在面板输入参数，适合自动化生产线、批量加工的自动尺寸补偿，能减少人工操作误差与辅助时间。","cate":"程序代码"}, {"q":"使用G51坐标缩放指令时，需要特别注意的是？","opt":["A.补偿值不会同步缩放","B.仅能放大不能缩小","C.只能整体等比例缩放","D.仅对坐标生效对进给无影响"],"ans":"A","tip":"G51缩放仅对编程轨迹坐标进行比例缩放，刀具半径补偿、长度补偿的数值不会同步缩放，若缩放比例差异较大，需重新设置对应的补偿值，否则会出现加工尺寸偏差。","cate":"程序代码"}, {"q":"启用G51.1镜像功能后，刀具半径补偿会发生什么变化？","opt":["A.补偿值自动翻倍","B.补偿自动取消","C.左右补偿自动反转","D.无任何变化"],"ans":"C","tip":"启用可编程镜像后，加工轨迹沿对称轴翻转，系统会自动反转刀具半径补偿的左右方向，即原G41会变为G42效果，原G42变为G41效果，无需手动修改补偿指令，保证镜像后轮廓尺寸正确。","cate":"程序代码"}, {"q":"G68坐标旋转指令中，R值为正代表的旋转方向是？","opt":["A.沿Y轴旋转","B.逆时针旋转","C.沿X轴旋转","D.顺时针旋转"],"ans":"B","tip":"在G17 XY平面内，G68的R参数为正值时代表绕旋转中心逆时针旋转，负值代表顺时针旋转，角度方向规则与圆弧插补的顺逆规则一致，编程时需注意角度正负与加工方向匹配。","cate":"程序代码"}, {"q":"对型腔拐角精度要求高的精加工，优先选用的运行模式是？","opt":["A.G64连续路径模式","B.G00快速模式","C.任意模式均可","D.G61精确停止模式"],"ans":"D","tip":"G61精确停止模式下，每个程序段结束时刀具都会减速到零并校验到位精度，可保证拐角处的轮廓位置准确，不会出现圆角偏差，适合对拐角、节点精度要求高的精加工场景。","cate":"程序代码"}, {"q":"执行G27返回参考点检查时触发报警，最可能的原因是？","opt":["A.主轴未停止","B.冷却未关闭","C.刀具未准确到达参考点","D.进给速度过快"],"ans":"C","tip":"G27的功能是校验指定位置是否为机床参考点，若刀具实际位置与参考点偏差超出系统允许范围，就会触发参考点返回异常报警，出现该报警时需重新执行回零操作并检查机械位置。","cate":"程序代码"}, {"q":"执行G29从参考点返回指令前，必须先执行的指令是？","opt":["A.G28返回参考点","B.M05主轴停止","C.G80取消循环","D.G40取消补偿"],"ans":"A","tip":"G29是从参考点向目标点移动的指令，必须在G28返回参考点之后执行，它会沿着G28的返回路径反向移动，保证移动路径安全无干涉，不可在未回零的状态下直接调用。","cate":"程序代码"}, {"q":"G31跳转功能接收到探头触发信号后，会立即执行的动作是？","opt":["A.返回安全高度","B.记录当前坐标并停止进给","C.主轴停止","D.触发报警"],"ans":"B","tip":"G31跳转指令执行时实时检测外部探头信号，一旦接收到触发信号，会立即停止当前轴的进给运动，同时自动记录触发瞬间的坐标值，是工件找正、在机检测的核心功能指令。","cate":"程序代码"}, {"q":"选用M41低速主轴档位加工，最适合的工艺场景是？","opt":["A.小直径钻孔","B.攻丝加工","C.大直径面铣开粗","D.高速精铣"],"ans":"C","tip":"M41低速档通过齿轮降速大幅提升主轴输出扭矩，可承载更大的切削负载，适合大直径面铣刀钢件开粗、重载切削等需要大切削力的场景，避免主轴过载闷车。","cate":"程序代码"}, {"q":"M13组合指令最适合用于以下哪个工序的启动？","opt":["A.铣削加工开始","B.程序结束","C.工件找正","D.换刀前准备"],"ans":"A","tip":"M13等效于同时执行M03主轴正转与M08液态切削液开启，可一步完成主轴与冷却的同步启动，减少程序段数量，非常适合铣削、钻孔等加工工序开始前的初始化操作。","cate":"程序代码"}, {"q":"数控程序中，D代码与H代码的核心区别是？","opt":["A.D用于选刀，H用于调速","B.两者功能完全一致","C.D调用长度补偿，H调用半径补偿","D.D调用半径补偿，H调用长度补偿"],"ans":"D","tip":"D代码与H代码都是补偿调用地址，但功能不同：D代码用于调用刀具半径补偿寄存器，配合G41/G42使用；H代码用于调用刀具长度补偿寄存器，配合G43/G44使用，不可混淆使用。","cate":"程序代码"}, {"q":"G92设定的临时坐标系，在下列哪种操作后不会失效？","opt":["A.按下复位键","B.同模态下连续运行程序","C.系统断电重启","D.执行G28回零"],"ans":"B","tip":"G92设定的是程序临时坐标系，仅在当前程序连续运行时保持生效，系统断电、复位、执行回零操作后都会失效，它不会修改工件坐标系的存储参数，属于一次性临时设定。","cate":"程序代码"}, {"q":"G53机床坐标系指令最适合的应用场景是？","opt":["A.多工位加工","B.工件轮廓切削","C.换刀点、安全点等固定机床位置移动","D.阵列孔编程"],"ans":"C","tip":"G53直接调用机床坐标系，坐标值以机床原点为基准，不受任何工件坐标系偏置影响，定位位置绝对固定，最适合移动到换刀点、安全点等机床固定位置，保证位置准确无误。","cate":"程序代码"}, {"q":"模态G代码的核心特点是？","opt":["A.指定一次后持续生效直到被取消","B.不能手动取消","C.仅当前程序段生效","D.所有G代码都是模态的"],"ans":"A","tip":"模态G代码的特点是在程序中指定一次后，会持续保持生效状态，直到被同组其他模态指令替代或被取消指令终止，如G01、G41、G54等都属于模态指令，可大幅简化编程。","cate":"程序代码"}, {"q":"非模态G代码的核心特点是？","opt":["A.所有辅助指令都是非模态的","B.仅在当前程序段生效","C.不能单独使用","D.持续生效直到被取消"],"ans":"B","tip":"非模态G代码仅在编写该指令的当前程序段内生效，执行完立即失效，不会对后续程序段产生影响，如G04暂停、G28回零、G31跳转等都属于非模态指令。","cate":"程序代码"}, {"q":"判断G02/G03圆弧顺逆的正确视角是？","opt":["A.从垂直于加工平面的轴正方向向负方向看","B.从机床正面观察","C.沿进给方向观察","D.任意视角均可"],"ans":"A","tip":"圆弧顺逆的判断必须基于对应加工平面的正视视角，即从垂直于该平面的坐标轴正方向向负方向观察，比如G17 XY平面需从Z轴正方向看向负方向，视角错误会导致圆弧方向完全相反。","cate":"程序代码"}, {"q":"圆弧插补的IJK编程与R编程相比，核心优势是？","opt":["A.圆弧精度更高","B.可加工整圆","C.编程更简单","D.计算量更小"],"ans":"B","tip":"R编程无法定义完整的360°整圆，否则起点终点重合会出现路径歧义，而IJK编程通过圆心相对起点的增量坐标定义圆弧，可精准加工整圆，且圆弧轨迹精度更稳定，是复杂圆弧的首选编程方式。","cate":"程序代码"}, {"q":"G43.1刀具长度动态微调功能的典型应用场景是？","opt":["A.精密零件的尺寸在线补偿","B.粗加工开粗","C.快速定位","D.换刀校准"],"ans":"A","tip":"G43.1支持加工过程中动态调整刀具长度补偿值，无需停机修改参数，适合高精度零件的尺寸在线微调、刀具磨损实时补偿等场景，可有效提升精密加工的尺寸合格率。","cate":"程序代码"}, {"q":"刀具半径补偿加工内凹轮廓拐角时，出现过切的最可能原因是？","opt":["A.进给速度过快","B.转速过高","C.刀具半径大于拐角圆弧半径","D.补偿值过小"],"ans":"C","tip":"加工内凹圆弧拐角时，若刀具半径值大于拐角圆弧的半径，刀具中心轨迹会出现干涉计算错误，导致拐角过切，编程前需根据最小内凹圆弧尺寸选择合适直径的刀具。","cate":"程序代码"}, {"q":"固定循环模态下直接执行G00移动指令，会出现什么后果？","opt":["A.循环继续执行","B.可能触发报警或轨迹异常","C.固定循环自动取消","D.正常快速移动"],"ans":"B","tip":"固定循环属于模态指令，若未用G80取消就直接执行G00等移动指令，部分系统会出现轨迹计算冲突，触发报警或出现非预期的循环动作，正确操作是先执行G80取消循环，再执行普通移动指令。","cate":"程序代码"}, {"q":"加工中心使用G96恒线速功能的主要限制是？","opt":["A.仅能用于X轴","B.仅适用于车削，铣削完全不可用","C.仅能用于钻孔","D.铣削端面时可有限使用但需限制最高转速"],"ans":"D","tip":"G96恒线速在加工中心中并非完全不可用，铣削圆形端面时可有限使用，但必须配合G50限制最高转速，防止小直径区域转速过高引发危险，且常规铣削轮廓极少使用该功能，它是车床的典型功能。","cate":"程序代码"}, {"q":"G65与G66宏程序调用的核心区别是？","opt":["A.G66不能传递参数","B.两者功能完全一致","C.G65是非模态单次调用，G66是模态调用","D.G65是模态调用，G66是非模态调用"],"ans":"C","tip":"G65是非模态宏程序调用，仅执行一次调用；G66是模态宏程序调用，指定后每个程序段结束都会自动调用一次宏程序，直到G67取消，适合固定循环类的自定义宏程序开发。","cate":"程序代码"}, {"q":"G65宏程序调用中，地址B对应的变量号是？","opt":["A.#2","B.#1","C.#3","D.#4"],"ans":"A","tip":"G65宏程序参数传递有固定的地址与变量对应关系：A对应#1，B对应#2，C对应#3，D对应#4，以此类推，是宏程序参数传递的基础规则，编程时需按对应关系赋值。","cate":"程序代码"}, {"q":"G10指令中，L2与L20修改坐标系的核心区别是？","opt":["A.两者功能一致","B.L2修改刀补，L20修改坐标系","C.L2增量叠加，L20绝对赋值","D.L2绝对赋值，L20增量叠加"],"ans":"D","tip":"G10修改工件坐标系时，L2代表绝对赋值方式，直接将坐标系偏置替换为指定数值；L20代表增量赋值方式，在原有偏置值基础上叠加指定的增量，分别适用于基准设定与微调场景。","cate":"程序代码"}, {"q":"设置G76精镗循环的Q让刀量时，下列原则正确的是？","opt":["A.略大于刀尖突出量且小于孔径余量","B.越大越好","C.任意数值均可","D.越小越好"],"ans":"A","tip":"G76的Q让刀量设置需适中：过小无法避开刀尖，会划伤孔壁；过大则退刀时易碰撞孔壁边缘。合理值应略大于刀尖突出量，同时小于孔径单边余量，保证退刀安全且不损伤孔壁。","cate":"程序代码"}, {"q":"G83深孔钻循环的Q值设置过小，可能导致的问题是？","opt":["A.孔径变大","B.加工效率过低","C.刀具过载","D.排屑不畅"],"ans":"B","tip":"G83的Q值是每次钻削深度，设置过小会导致钻削次数大幅增加，频繁退刀排屑会大幅降低加工效率；设置过大则排屑不畅易断刀，需根据孔径、深度与材料合理匹配数值。","cate":"程序代码"}, {"q":"加工中心自动换刀的标准程序流程，正确的顺序是？","opt":["A.T代码预选刀→回换刀点→M06换刀","B.M06换刀→T代码选刀→主轴启动","C.M06换刀→T代码选刀","D.主轴停止→直接换刀"],"ans":"A","tip":"标准自动换刀流程为：加工过程中提前用T代码预选刀到换刀位，加工结束后移动到换刀参考点，执行M06完成换刀，预选刀可与加工并行，大幅缩短换刀等待时间，提升加工效率。","cate":"程序代码"}, {"q":"使用G41半径补偿加工封闭型腔时，最佳切入方式是？","opt":["A.任意方向切入","B.沿轮廓切线方向切入","C.斜线快速切入","D.直接垂直切入"],"ans":"B","tip":"型腔加工建立半径补偿时，沿轮廓切线方向切入可让补偿值逐步叠加，避免法向切入导致的接刀痕与过切，能保证切入处的轮廓平滑，是精加工型腔的标准切入方式。","cate":"程序代码"}, {"q":"在圆弧插补段内执行G40取消半径补偿，会导致的问题是？","opt":["A.补偿取消更平滑","B.加工效率降低","C.轨迹畸变引发过切","D.系统无任何变化"],"ans":"C","tip":"圆弧段内取消半径补偿时，补偿值的突变会与圆弧轨迹计算冲突，导致刀具轨迹出现畸变凸起，刮伤已加工圆弧表面甚至过切，因此必须在直线段内完成补偿的建立与取消。","cate":"程序代码"}, {"q":"批量加工等高度多孔时，G99模式相比G98的效率优势主要源于？","opt":["A.主轴转速更高","B.减少Z轴空行程距离","C.进给速度更快","D.切削速度更快"],"ans":"B","tip":"G99模式加工完单孔后仅返回R点平面，G98则返回更高的初始平面，多孔加工时G99可大幅减少Z轴往返的空行程距离，缩短非加工辅助时间，显著提升批量钻孔的整体效率。","cate":"程序代码"}, {"q":"G52局部坐标系指令的核心作用是？","opt":["A.设定机床坐标系","B.替代G54工件坐标系","C.取消所有坐标系偏置","D.在当前工件坐标系内设定子原点"],"ans":"D","tip":"G52用于在当前生效的工件坐标系内，设定一个局部子原点，后续坐标以该子原点为基准，适合同一工件上多个重复特征、阵列特征的编程，无需修改主工件坐标系偏置。","cate":"程序代码"}, {"q":"程序中同时使用G92与G54时，最可能出现的问题是？","opt":["A.系统崩溃","B.坐标系基准混乱导致尺寸错误","C.加工效率降低","D.无任何影响"],"ans":"B","tip":"G92会临时改变当前坐标系原点，与G54等工件坐标系叠加后会导致坐标基准混乱，加工尺寸出现偏差，通常不建议二者混用，确需使用时需明确基准切换逻辑并做好验证。","cate":"程序代码"}, {"q":"批量生产中需要每加工10件抽检一次尺寸，最适合选用的暂停指令是？","opt":["A.M02","B.G04","C.M01","D.M00"],"ans":"C","tip":"M01选择性暂停可通过面板开关控制是否生效，抽检时打开开关程序就会暂停，正常批量生产时关闭开关即可自动跳过，无需修改程序，灵活适配批量生产与抽检的双重需求。","cate":"程序代码"}, {"q":"G17 XY平面内，刀具半径补偿的参与轴是？","opt":["A.X轴和Z轴","B.仅X轴","C.Y轴和Z轴","D.X轴和Y轴"],"ans":"D","tip":"刀具半径补偿在指定的加工平面内生效，G17 XY平面对应X、Y轴参与补偿计算，Z轴不受半径补偿影响，补偿平面与补偿轴必须对应，否则会出现补偿方向错误。","cate":"程序代码"}, {"q":"多工件坐标系编程的核心优势是？","opt":["A.加工精度更高","B.编程更简单","C.一次装夹加工多个工件提升效率","D.刀具寿命更长"],"ans":"C","tip":"使用G54~G59多工件坐标系，可实现一次装夹加工多个工位或多个工件，减少重复装夹的辅助时间，提升批量加工效率，是加工中心多工位生产的标准编程方案。","cate":"程序代码"}, {"q":"锪孔加工时在孔底加入G04暂停的主要目的是？","opt":["A.修光孔底平面提高平整度","B.降低主轴负载","C.排屑","D.冷却刀具"],"ans":"A","tip":"锪孔加工时孔底加入G04暂停，可让刀具在孔底停留旋转数圈，修平孔底的加工残留刀痕，显著提升孔底平面的平整度与光洁度，是保证锪孔质量的常用编程技巧。","cate":"程序代码"}, {"q":"G28与G30返回参考点的核心区别是？","opt":["A.无本质区别","B.G30速度更快","C.G30返回第二参考点，位置可设定","D.G28精度更高"],"ans":"C","tip":"G28返回机床第一参考点也就是机械原点，位置固定；G30返回第二参考点，位置可通过系统参数灵活设定，通常设置为换刀点，距离加工区域更近，可缩短换刀行程提升效率。","cate":"程序代码"}, {"q":"刚性攻丝功能正常生效的硬件前提是？","opt":["A.冷却压力足够","B.主轴安装位置编码器","C.使用专用丝锥","D.进给速度足够低"],"ans":"B","tip":"刚性攻丝需要主轴安装位置编码器，实现主轴转角与Z轴进给的精准同步，保证每转进给量严格等于导程，无编码器的机床只能使用柔性攻丝头，无法实现刚性攻丝。","cate":"程序代码"}, {"q":"刀具补偿中的磨耗补偿值的主要作用是？","opt":["A.设定刀具基准尺寸","B.设置刀具总长","C.替代形状补偿","D.微调补偿量抵消刀具磨损"],"ans":"D","tip":"刀具补偿分为形状补偿与磨耗补偿两部分：形状补偿设基准尺寸，磨耗补偿用于微量调整，抵消刀具正常磨损带来的尺寸偏差，无需修改基准值即可实现尺寸微调。","cate":"程序代码"}, {"q":"G64连续路径模式对加工表面质量的主要影响是？","opt":["A.降低表面光洁度","B.段间平滑过渡提升表面光洁度","C.无任何影响","D.导致轮廓过切"],"ans":"B","tip":"G64连续路径模式下，刀具在相邻程序段衔接处不会减速停止，可平滑过渡到下一段轨迹，避免了频繁加减速留下的接刀痕，能显著提升曲面、长轮廓的表面加工质量。","cate":"程序代码"}, {"q":"启用可编程镜像后，原程序中的G41左补偿会呈现什么效果？","opt":["A.补偿值翻倍","B.补偿自动取消","C.变为右补偿效果","D.仍为左补偿"],"ans":"C","tip":"镜像后整个加工轨迹沿对称轴翻转，走刀方向反向，原有的左补偿相对工件轮廓会变为右补偿效果，系统会自动适配补偿方向，无需手动修改G41/G42指令。","cate":"程序代码"}, {"q":"G68坐标旋转功能的旋转角度基准是？","opt":["A.任意基准","B.当前刀具方向","C.机床坐标系的轴方向","D.当前工件坐标系的轴方向"],"ans":"D","tip":"G68坐标旋转以当前生效的工件坐标系的坐标轴方向为角度基准，围绕指定旋转中心进行旋转，所有后续编程坐标都按旋转角度重新计算，与机床坐标系无关。","cate":"程序代码"}, {"q":"使用G10可编程数据输入时，最重要的安全注意事项是？","opt":["A.不能修改刀补","B.必须停机执行","C.确认修改对象与数值避免超差","D.只能修改坐标系"],"ans":"C","tip":"G10可自动修改补偿与坐标系参数，若数值错误会直接导致加工尺寸超差甚至碰撞，编程时必须反复确认修改对象、修改方式与数值大小，运行前最好进行单段测试验证。","cate":"程序代码"}, {"q":"使用G31探头测量时，对测量精度影响最小的因素是？","opt":["A.主轴转速","B.系统响应时间","C.探头触发延迟","D.进给速度"],"ans":"A","tip":"G31测量精度主要受进给速度、探头触发延迟、系统响应时间等因素影响，测量时主轴通常处于停止状态，因此主轴转速对测量精度几乎没有影响。","cate":"程序代码"}, {"q":"切换主轴高低档位时，必须满足的前提条件是？","opt":["A.主轴高速旋转","B.切削液开启","C.进给运动中","D.主轴停止"],"ans":"D","tip":"主轴档位切换通过齿轮啮合实现，必须在主轴完全停止的状态下执行，否则会打坏齿轮齿面，严重损坏主轴变速箱，编程时档位切换指令前必须先执行M05主轴停止。","cate":"程序代码"}, {"q":"关于M代码与轴移动指令的执行时序，下列说法正确的是？","opt":["A.同段内同时开始同时结束","B.M代码通常先执行完成后再执行轴移动","C.无固定时序","D.轴移动始终先执行，完成后再执行M代码"],"ans":"B","tip":"多数系统中，同一程序段内的M代码会先执行并确认完成，再执行轴移动指令，比如M03与G00同段时，会先启动主轴达到转速再移动，保证移动到切削位置时主轴已达到设定转速。","cate":"程序代码"}, {"q":"对G00快速定位精度影响最小的因素是？","opt":["A.加减速参数","B.丝杠螺距误差","C.切削液压力","D.机床反向间隙"],"ans":"C","tip":"G00定位精度主要受机床机械精度、反向间隙、丝杠误差、加减速参数等因素影响，切削液仅用于冷却润滑，对定位精度几乎没有直接影响。","cate":"程序代码"}, {"q":"设置G01切削进给速度时，无需考虑的因素是？","opt":["A.工件材料","B.加工余量","C.刀具材质","D.程序段号大小"],"ans":"D","tip":"进给速度需根据工件材料、刀具材质、加工余量、冷却条件等工艺因素合理选择，程序段号只是程序的标记序号，与工艺参数无关，不影响进给速度的设置。","cate":"程序代码"}, {"q":"圆弧插补加工后出现半径尺寸误差，最不可能的原因是？","opt":["A.圆心坐标计算错误","B.主轴转速偏差","C.圆弧终点坐标编程错误","D.刀具半径补偿值错误"],"ans":"B","tip":"圆弧尺寸误差主要源于坐标编程错误、补偿值错误、圆心参数错误等几何因素，主轴转速主要影响表面质量与刀具寿命，对圆弧半径尺寸的直接影响极小。","cate":"程序代码"}, {"q":"固定循环K重复次数参数正常生效的前提是？","opt":["A.G99返回模式","B.G98返回模式","C.G91增量模式","D.G90绝对模式"],"ans":"C","tip":"K参数是循环重复次数，必须配合G91增量坐标模式使用，每次循环后坐标按增量偏移，才能加工出等间距的阵列孔；G90绝对模式下K参数通常只执行一次，无法实现多孔加工。","cate":"程序代码"}, {"q":"取消刀具长度补偿时，最佳的操作高度是？","opt":["A.任意高度均可","B.切削过程中","C.孔底位置","D.安全高度以上"],"ans":"D","tip":"取消刀具长度补偿必须在工件上方的安全高度以上执行，否则补偿值取消后Z轴位置突变，可能导致刀具扎入工件造成过切或断刀，是长度补偿操作的重要安全原则。","cate":"程序代码"}, {"q":"程序运行时出现G代码模态冲突报警，最可能的原因是？","opt":["A.补偿值过大","B.进给速度过快","C.同组模态指令同时生效","D.转速过高"],"ans":"C","tip":"每组模态G代码同一时间只能有一个生效，若程序逻辑错误导致同组两个模态指令同时生效，系统就会触发模态冲突报警，需检查程序中G代码的切换逻辑是否正确。","cate":"程序代码"}, {"q":"M98子程序调用与G65宏程序调用的核心区别是？","opt":["A.宏程序可传递参数实现变量运算","B.子程序不能重复调用","C.子程序执行更快","D.无本质区别"],"ans":"A","tip":"M98子程序调用只是重复执行固定程序段，无法灵活传递参数；G65宏程序调用可通过地址传递参数，内部支持变量运算、逻辑判断，能实现参数化、通用化的复杂加工功能，灵活性远高于子程序。","cate":"程序代码"}, {"q":"程序初始化组合指令 G21 G90 G17 中，G17 的功能是？","opt":["A. 启用绝对坐标","B. 指定 XY 加工平面","C. 设定进给模式","D. 设定公制单位"],"ans":"B","tip":"G21 用于设定公制单位（mm），G90 启用绝对坐标编程，G17 指定 XY 平面为加工平面，该组合是铣削加工程序的标准初始化开头，用于统一加工基准与坐标系规则。","cate":"程序代码"}, {"q":"刀长补偿建立的标准组合指令 G43 G00 Z50 H01 中，H01 的含义是？","opt":["A.1 号工件坐标系","B.1 号刀具号","C.1 号刀长补偿号","D.1 号半径补偿号"],"ans":"C","tip":"G43 为正向刀长补偿指令，需配合 H 地址指定刀长补偿号，H01 对应机床参数中 1 号刀长补偿值，用于自动补偿刀具长度偏差，保证 Z 向加工深度准确。","cate":"程序代码"}, {"q":"主轴启动与冷却开启的常用组合 M03 S1500 M08 中，M03 的作用是？","opt":["A. 主轴停止","B. 主轴正转","C. 主轴反转","D. 冷却液开启"],"ans":"B","tip":"M03 控制主轴正转，S 代码指定主轴转速，M08 开启切削液冷却，该组合常用于切削加工前的准备动作，同步完成主轴启动与冷却供给，保障切削工况稳定。","cate":"程序代码"}, {"q":"刀具半径左补偿建立组合 G01 G41 X10 Y0 D01 F100 中，D01 指代的是？","opt":["A.1 号坐标系","B.1 号刀具","C.1 号半径补偿号","D.1 号刀长补偿"],"ans":"C","tip":"G41 为刀具半径左补偿指令，需通过 D 地址调用对应的半径补偿参数，D01 对应 1 号刀具半径补偿值，加工时刀具会沿编程路径左侧偏移一个半径值，保证轮廓尺寸精准。","cate":"程序代码"}, {"q":"钻孔固定循环标准组合 G99 G81 X0 Y0 Z-20 R5 F100 中，G99 的作用是？","opt":["A. 设定绝对坐标","B. 设定高速钻孔模式","C. 钻完返回初始平面","D. 钻完返回 R 点平面"],"ans":"D","tip":"G99 是固定循环返回 R 点平面指令，配合 G81 钻孔循环使用时，完成单孔加工后刀具仅退回到 R 安全平面，适合连续多孔加工，可减少空行程提升加工效率。","cate":"程序代码"}, {"q":"深孔钻削循环组合 G98 G83 X0 Y0 Z-50 R5 Q5 F80 中，Q 参数的含义是？","opt":["A. 孔底停留时间","B. 主轴转速","C. 每次钻削深度","D. 安全平面高度"],"ans":"C","tip":"G83 为深孔啄钻循环，Q 参数指定每次钻削的进给深度，钻削至设定深度后刀具会退回排屑，G98 指令加工完成后返回初始平面，适合深度较大的孔加工场景。","cate":"程序代码"}, {"q":"自动换刀的标准执行组合 T02 M06 的执行逻辑是？","opt":["A. 将 2 号刀换到主轴上","B. 卸下当前刀具","C. 先换刀再选 2 号刀","D. 预选 2 号刀到刀位"],"ans":"A","tip":"T02 用于指定目标刀具号，M06 为换刀执行指令，该组合会将刀库中 2 号刀具更换到主轴上，是加工中心自动换刀的核心指令，更换前需确保主轴停转且回换刀位置。","cate":"程序代码"}, {"q":"程序结尾常用组合 M05 M09 M30 中，M30 的核心作用是？","opt":["A. 关闭冷却液","B. 程序暂停","C. 主轴停止","D. 程序结束并复位"],"ans":"D","tip":"M05 控制主轴停止转动，M09 关闭所有冷却功能，M30 为程序结束指令，执行后光标返回程序开头并复位模态指令，是加工程序标准的收尾组合，保证设备状态复位。","cate":"程序代码"}, {"q":"取消刀具半径补偿的标准组合 G40 G00 X100 Y100，必须配合移动指令的原因是？","opt":["A. 减少程序行数","B. 提升运行速度","C. 避免过切工件","D. 激活坐标系"],"ans":"C","tip":"G40 为取消半径补偿指令，必须搭配 G00 或 G01 移动指令执行，在退刀过程中逐步取消补偿偏移，若直接原地取消会导致刀具路径突变，极易刮伤已加工表面或撞刀。","cate":"程序代码"}, {"q":"Z 轴回参考点的安全组合 G91 G28 Z0 中，G91 的作用是？","opt":["A. 回零指令","B. 绝对坐标模式","C. 设定工件坐标","D. 增量坐标模式"],"ans":"D","tip":"G28 为自动返回参考点指令，搭配 G91 增量模式时，以当前位置为起点增量移动回零，可避免因工件坐标系偏移导致的回零碰撞，是 Z 轴回零的标准安全写法。","cate":"程序代码"}, {"q":"攻丝固定循环组合 G84 X0 Y0 Z-20 R5 S1000 中，主轴的动作逻辑是？","opt":["A. 全程正转","B. 全程反转","C. 攻进正转，退刀反转","D. 攻进反转，退刀正转"],"ans":"C","tip":"G84 为右旋攻丝循环，执行时主轴正转进给攻丝，到达孔底后主轴自动反转退回，需匹配对应螺距的进给速度，S 代码指定攻丝转速，是内螺纹加工的标准指令组合。","cate":"程序代码"}, {"q":"精镗孔循环组合 G76 X0 Y0 Z-25 R5 Q0.5 F100 中，Q 参数的作用是？","opt":["A. 孔底停留时间","B. 孔底主轴定向让刀量","C. 安全平面高度","D. 每次镗削深度"],"ans":"B","tip":"G76 为精镗循环，到达孔底后主轴会定向停止，沿刀尖反方向偏移 Q 值距离后再退刀，避免划伤孔壁，是保证镗孔表面光洁度与尺寸精度的核心参数。","cate":"程序代码"}, {"q":"坐标系旋转指令组合 G68 X0 Y0 R45 的功能是？","opt":["A. 刀具偏移 45 度","B. 主轴旋转 45 度","C. 将坐标系绕原点旋转 45 度","D. 将工件移动 45 度"],"ans":"C","tip":"G68 为坐标系旋转指令，X0 Y0 指定旋转中心，R45 指定旋转角度为 45 度，开启后所有编程坐标均按该角度旋转计算，适合斜向轮廓、阵列斜孔等加工场景。","cate":"程序代码"}, {"q":"局部坐标系设定组合 G52 X10 Y10 的作用是？","opt":["A. 激活 G55 坐标系","B. 设定刀具补偿","C. 设定机床坐标系","D. 偏移工件坐标系原点"],"ans":"D","tip":"G52 用于在当前工件坐标系基础上设定局部子坐标系，X10 Y10 为局部原点相对于原坐标系原点的偏移量，常用于多孔位、多型腔的局部编程，简化坐标计算。","cate":"程序代码"}, {"q":"进给模式切换组合 G95 F0.2 中，F0.2 的单位是？","opt":["A.r/min","B.m/min","C.[B.mm/r](B.mm/r)","D.[A.mm/min](A.mm/min)"],"ans":"C","tip":"G95 为每转进给模式，F 值单位为 mm/r，即主轴每旋转一圈刀具进给 0.2mm，该模式下车削、攻丝加工中进给更稳定，需配合主轴转速匹配切削线速度。","cate":"程序代码"}, {"q":"取消固定循环的标准指令组合 G80 G00 Z50 的作用是？","opt":["A. 注销所有固定循环模态","B. 暂停钻孔循环","C. 继续钻孔循环","D. 设定钻孔深度"],"ans":"A","tip":"G80 为固定循环取消指令，执行后注销 G81/G83/G84 等所有固定循环模态，机床恢复普通移动模式，搭配 Z 轴抬刀动作可确保加工完孔群后安全移动，避免误动作。","cate":"程序代码"}, {"q":"主轴恒线速模式组合 G96 S120 中，S120 的单位是？","opt":["A.[C.mm/min](C.mm/min)","B.[D.mm/r](D.mm/r)","C.m/min","D.r/min"],"ans":"C","tip":"G96 为主轴恒线速度控制模式，S 值单位为 m/min，执行时主轴转速会随切削直径变化自动调整，保持切削线速度恒定，多用于车削端面或大直径工件的圆周铣削。","cate":"程序代码"}, {"q":"暂停延时指令组合 G04 P2000 的延时时长是？","opt":["A.0.2 秒","B.2 秒","C.2 分钟","D.2 毫秒"],"ans":"B","tip":"G04 为进给暂停指令，P 参数单位为毫秒，P2000 对应 2 秒延时，执行时机床进给动作暂停，主轴保持转动，常用于锪孔、槽底光整等需要短暂停留保证加工质量的场景。","cate":"程序代码"}, {"q":"工件坐标系设定组合 G10 L2 P1 X0 Y0 Z0 的功能是？","opt":["A. 设定 G54 坐标系原点","B. 设定机床坐标","C. 设定刀具补偿值","D. 设定局部坐标系"],"ans":"A","tip":"G10 为可编程参数输入指令，L2 指定设定工件坐标系，P1 对应 G54 坐标系，X/Y/Z 为新的原点坐标值，该组合可在程序中自动修改工件坐标系原点，适配柔性加工需求。","cate":"程序代码"}, {"q":"取消刀长补偿的安全组合 G49 G28 Z0 的执行顺序是？","opt":["A. 同步执行","B. 先取消刀长补偿再回零","C. 先回零再取消补偿","D. 仅回零不取消补偿"],"ans":"B","tip":"G49 为刀长补偿取消指令，搭配 G28 Z 轴回零执行时，先注销当前刀长补偿再回参考点，避免带补偿回零导致 Z 轴坐标偏差，是换刀前的标准安全操作流程。","cate":"程序代码"}, {"q":"圆弧插补组合 G02 X50 Y0 R25 F80 中，G02 的插补方向是？","opt":["A.XY 平面顺时针","B.YZ 平面顺时针","C.XY 平面逆时针","D.XZ 平面顺时针"],"ans":"A","tip":"G02 为顺时针圆弧插补指令，在 G17 XY 平面下，刀具沿顺时针方向走圆弧轨迹，R25 为圆弧半径，F80 为切削进给速度，常用于外圆、内孔、圆角轮廓的加工。","cate":"程序代码"}, {"q":"增量坐标编程组合 G91 G01 X10 Y-5 F100 中，坐标值的含义是？","opt":["A. 相对于 R 点的位置","B. 相对于机床原点的位置","C. 相对于上一点的增量位移","D. 相对于工件原点的绝对位置"],"ans":"C","tip":"G91 为增量坐标编程模式，后续 X/Y/Z 数值均为相对于前一位置的移动增量，正负号代表移动方向，适合重复轮廓、阵列加工的简化编程，减少坐标计算量。","cate":"程序代码"}, {"q":"第二参考点回零组合 G30 Z0 的主要应用场景是？","opt":["A. 自动换刀位置","B. 深度测量","C. 工件对刀","D. 工件装夹"],"ans":"A","tip":"G30 为返回第二参考点指令，加工中心的第二参考点通常设定为自动换刀位置，换刀前执行该指令可将 Z 轴精准移动到换刀高度，保证换刀动作平稳无碰撞。","cate":"程序代码"}, {"q":"右旋攻丝循环搭配 G95 模式时，进给 F 值应等于？","opt":["A. 螺纹深度","B. 螺纹螺距","C. 主轴转速","D. 安全高度"],"ans":"B","tip":"G95 每转进给模式下，攻丝循环的 F 值需与螺纹螺距完全匹配，保证主轴每转一圈刀具进给一个螺距，避免乱牙，是刚性攻丝编程的核心参数匹配规则。","cate":"程序代码"}, {"q":"刀具半径右补偿组合 G42 G03 X10 Y0 R10 中，刀具偏移方向是？","opt":["A. 沿 X 轴正方向","B. 沿 Y 轴正方向","C. 沿进给方向左侧","D. 沿进给方向右侧"],"ans":"D","tip":"G42 为刀具半径右补偿指令，沿刀具进给前进方向观察，刀具中心会向编程路径右侧偏移一个补偿半径值，搭配圆弧插补可实现内圆角、外轮廓的精准尺寸加工。","cate":"程序代码"}, {"q":"高速钻削循环 G73 与 G83 的核心区别是？","opt":["A. 进给速度不同","B. 钻孔深度不同","C. 排屑方式不同","D. 主轴转速不同"],"ans":"C","tip":"G73 为高速浅孔钻循环，每次钻削后仅小幅退刀断屑；G83 为深孔啄钻循环，每次钻削后退回 R 点完全排屑，需根据孔深与排屑需求选择对应循环组合。","cate":"程序代码"}, {"q":"机床坐标系移动组合 G53 G00 X0 Y0 Z0 的含义是？","opt":["A. 设定局部坐标系","B. 移动到机床机械原点","C. 设定工件坐标","D. 移动到 G54 原点"],"ans":"B","tip":"G53 为机床坐标系选择指令，为非模态指令仅当前段有效，执行后刀具移动到机床机械坐标系对应坐标位置，不受工件坐标系偏移影响，常用于换刀、测量等固定位置动作。","cate":"程序代码"}, {"q":"程序选择停指令 M01 生效的前提是？","opt":["A. 冷却关闭后","B. 主轴停止后","C. 程序自动运行","D. 机床面板选择停开关打开"],"ans":"D","tip":"M01 为选择停止指令，仅当机床操作面板上的 “选择停” 开关处于开启状态时才会执行暂停，常用于首件检查、尺寸测量等可选工序节点，不影响批量自动加工。","cate":"程序代码"}, {"q":"背镗孔循环 G87 的典型退刀方式是？","opt":["A. 沿孔轴直接退回","B. 孔底主轴定向让刀后快速退回","C. 旋转退回","D. 慢速退回"],"ans":"B","tip":"G87 为背镗循环，加工时刀具从孔底反向镗削，到达孔底后主轴定向，刀尖反向偏移让刀后快速退回初始平面，避免划伤已加工孔壁，适合台阶孔、背面沉孔的加工。","cate":"程序代码"}, {"q":"英制单位设定指令 G20 对应的长度单位是？","opt":["A. 毫米","B. 米","C. 微米","D. 英寸"],"ans":"D","tip":"G20 为英制单位设定指令，后续所有坐标、进给、补偿数值单位均为英寸，与 G21 公制单位对应，编程时需在程序开头明确指定，避免单位混淆导致尺寸错误。","cate":"程序代码"}, {"q":"铰孔固定循环 G85 的动作特点是？","opt":["A. 工进铰削，快速退刀","B. 快速进刀，快速退刀","C. 工进铰削，工进退刀","D. 间歇进刀排屑"],"ans":"C","tip":"G85 为铰孔循环，执行时以进给速度工进铰削至孔底，再以相同进给速度工进退刀，保证孔壁光洁度与尺寸精度，适合高精度孔的精加工工序。","cate":"程序代码"}, {"q":"宏程序模态调用组合 G66 P1000 L2 的功能是？","opt":["A. 调用一次 O1000 宏程序","B. 取消宏程序调用","C. 循环调用 2 次宏程序","D. 每段程序后自动调用 O1000 宏程序"],"ans":"D","tip":"G66 为模态宏程序调用指令，P 指定宏程序号，L 指定调用次数，开启后每个移动程序段执行完都会自动调用指定宏程序，直到 G67 指令取消，适合批量检测、补偿类工序。","cate":"程序代码"}, {"q":"取消坐标系旋转的指令是？","opt":["A.G69","B.G40","C.G80","D.G68"],"ans":"A","tip":"G69 为坐标系旋转取消指令，用于注销 G68 开启的坐标旋转功能，执行后坐标系恢复原始状态，通常在旋转轮廓加工完成后使用，避免后续加工坐标偏移。","cate":"程序代码"}, {"q":"主轴定位指令 M19 的主要应用场景是？","opt":["A. 高速铣削","B. 攻丝加工","C. 钻孔加工","D. 换刀、镗孔让刀"],"ans":"D","tip":"M19 为主轴定向停止指令，执行后主轴停止并锁定在固定角度位置，是自动换刀、精镗孔让刀、多面加工定位的必要前置指令，保证刀具角度精准一致。","cate":"程序代码"}, {"q":"G98 与 G99 在固定循环中的核心差异是？","opt":["A. 钻孔深度不同","B. 退刀返回平面不同","C. 加工进给速度不同","D. 排屑方式不同"],"ans":"B","tip":"G98 指令固定循环加工完成后返回初始平面，适合孔群加工结束后的大距离移动；G99 返回 R 安全平面，适合连续多孔加工，可缩短空行程提升加工效率。","cate":"程序代码"}, {"q":"锪孔循环 G82 中孔底动作的特点是？","opt":["A. 孔底让刀偏移","B. 孔底主轴反转","C. 快速退刀","D. 孔底暂停延时"],"ans":"D","tip":"G82 为锪孔循环，刀具进给至孔底后会执行短暂停留延时，保证孔底平面光洁平整，再快速退刀，适合沉头孔、台阶孔、锪平面等对孔底质量有要求的加工场景。","cate":"程序代码"}, {"q":"G18 指令指定的加工平面是？","opt":["A.YZ 平面","B. 任意平面","C.XZ 平面","D.XY 平面"],"ans":"C","tip":"G18 指定 XZ 平面为加工平面，对应圆弧插补、刀具补偿均在 XZ 平面内生效，多用于立式加工中心的侧面铣削、XZ 面圆弧加工，与 G17、G19 为三大平面选择指令。","cate":"程序代码"}, {"q":"反攻丝循环 G74 的主轴动作逻辑是？","opt":["A. 反转攻进，正转退回","B. 全程正转","C. 正转攻进，反转退回","D. 全程反转"],"ans":"A","tip":"G74 为左旋攻丝循环，执行时主轴反转进给攻丝，到达孔底后主轴自动正转退回，需匹配左旋丝锥与对应螺距进给，是左旋内螺纹加工的标准指令组合。","cate":"程序代码"}, {"q":"程序暂停指令 M00 的执行效果是？","opt":["A. 程序结束复位","B. 仅暂停主轴","C. 仅暂停进给","D. 暂停所有动作，按启动后继续"],"ans":"D","tip":"M00 为程序强制停止指令，执行后主轴、进给、冷却全部暂停，程序停留在当前段，按下循环启动按钮后程序继续向下执行，常用于关键尺寸检测、排屑清理等工序。","cate":"程序代码"}, {"q":"G19 指令指定的加工平面是？","opt":["A. 斜面","B.YZ 平面","C.XY 平面","D.XZ 平面"],"ans":"B","tip":"G19 指定 YZ 平面为加工平面，圆弧插补、刀具半径补偿均在 YZ 平面内计算，多用于卧式加工中心或侧面立铣加工，是三大平面选择指令之一。","cate":"程序代码"}, {"q":"每分进给模式 G94 下，F100 的单位是？","opt":["A.[B.mm/min](B.mm/min)","B.m/min","C.[A.mm/r](A.mm/r)","D.r/min"],"ans":"A","tip":"G94 为每分钟进给模式，F 值单位为 mm/min，即刀具每分钟进给移动 100mm，是铣削、钻孔加工的默认进给模式，进给速度不受主轴转速直接影响。","cate":"程序代码"}, {"q":"G92 X0 Y0 Z0 指令的作用是？","opt":["A. 设定局部坐标","B. 设定工件坐标系原点","C. 设定刀具补偿","D. 回机床零点"],"ans":"B","tip":"G92 为设定工件坐标系指令，通过指定当前刀具位置对应的坐标值来设定工件原点，无需手动对刀输入，为模态指令，断电后坐标设定失效，多用于老式程序。","cate":"程序代码"}, {"q":"自动换刀前的标准安全指令组合通常包含？","opt":["A.G00 G41","B.G83 G99","C.G28 Z0 M19","D.G01 G42"],"ans":"C","tip":"自动换刀前需执行 Z 轴回参考点（G28 Z0）与主轴定向（M19），保证主轴位置与角度符合换刀要求，避免刀爪碰撞，是加工中心换刀流程的必备前置动作。","cate":"程序代码"}, {"q":"粗镗孔循环 G86 孔底的动作是？","opt":["A. 主轴定向让刀后退刀","B. 工进退刀","C. 孔底停留后退刀","D. 主轴停止后快速退刀"],"ans":"D","tip":"G86 为粗镗循环，刀具镗削至孔底后主轴停止转动，然后快速退回 R 点或初始平面，退刀时刀尖会划伤孔壁，加工效率高但精度一般，适合粗镗或半精镗工序。","cate":"程序代码"}, {"q":"G11 指令的功能是？","opt":["A. 取消可编程参数输入","B. 可编程参数输入","C. 坐标系旋转","D. 取消刀补"],"ans":"A","tip":"G11 为可编程参数输入取消指令，与 G10 配对使用，G10 开启参数写入模式修改坐标系、刀补等参数，G11 关闭写入模式，防止后续程序误改系统参数。","cate":"程序代码"}, {"q":"切削液雾状冷却开启指令是？","opt":["A.M09","B.M10","C.M08","D.M07"],"ans":"D","tip":"M07 为雾状切削液开启指令，通过压缩空气将切削液雾化喷出，适合高速铣削、深孔加工的冷却润滑，M08 为液状冷却，M09 为冷却关闭，三者为冷却系统核心指令。","cate":"程序代码"}, {"q":"工作台夹紧指令 M10 的作用是？","opt":["A. 锁紧回转工作台","B. 夹紧主轴刀具","C. 夹紧刀库","D. 夹紧工件"],"ans":"A","tip":"M10 为工作台夹紧指令，多用于带回转工作台的加工中心，转台分度完成后执行 M10 锁紧工作台，保证加工时工作台无位移，M11 为工作台松开指令。","cate":"程序代码"}, {"q":"G03 圆弧插补指令在 G17 平面下的方向是？","opt":["A. 直线","B. 逆时针","C. 螺旋","D. 顺时针"],"ans":"B","tip":"G03 为逆时针圆弧插补指令，在 G17 XY 平面下，沿 Z 轴正方向朝负方向观察，刀具沿逆时针方向走圆弧轨迹，常用于内孔、凹圆角等轮廓的精加工。","cate":"程序代码"}, {"q":"程序结束指令 M02 与 M30 的区别是？","opt":["A.M02 会关闭冷却","B.M30 不结束程序","C.M02 不复位程序光标","D.M30 不停止主轴"],"ans":"C","tip":"M02 为程序结束指令，执行后程序停止，光标停留在程序末尾；M30 执行后程序停止且光标返回程序开头，复位模态指令，更适合批量自动循环加工。","cate":"程序代码"}, {"q":"螺旋插补组合 G02 X0 Y0 Z-5 I-20 J0 F100 中，Z 轴的动作是？","opt":["A. 保持不动","B. 随圆弧同步进给下降","C. 快速移动","D. 间歇移动"],"ans":"B","tip":"螺旋插补是圆弧插补叠加第三轴直线进给，该指令在 XY 平面做顺时针圆弧的同时，Z 轴同步进给下降 5mm，常用于铣削内螺纹、螺旋槽等三维螺旋轮廓。","cate":"程序代码"}, {"q":"刀具补偿建立必须在直线移动段执行的原因是？","opt":["A. 系统计算需要过渡行程","B. 便于对刀","C. 减少程序长度","D. 提升加工速度"],"ans":"A","tip":"刀具半径 / 长度补偿建立时，数控系统需要逐步计算偏移量，通过直线移动段完成过渡，若原地启动补偿会出现路径突变，导致过切工件或撞刀，是编程的基本安全规则。","cate":"程序代码"}, {"q":"G54~G59 工件坐标系的切换方式是？","opt":["A. 自动切换","B. 手动输入切换","C. 无法切换","D. 程序中调用对应 G 代码"],"ans":"D","tip":"G54 至 G59 为 6 个标准工件坐标系，程序中写入对应 G 代码即可激活切换，支持多工位、多工件同时装夹加工，无需重复对刀，提升批量加工效率。","cate":"程序代码"}, {"q":"刚性攻丝循环必须开启的功能是？","opt":["A. 坐标系旋转","B. 主轴伺服同步","C. 刀具补偿","D. 冷却系统"],"ans":"B","tip":"刚性攻丝需要主轴转速与 Z 轴进给严格同步，主轴伺服与进给伺服闭环匹配，保证进给量与螺距精准对应，避免乱牙，是高精度攻丝的必备条件。","cate":"程序代码"}, {"q":"G04 X2.0 的延时时长是？","opt":["A.2 毫秒","B.2 分钟","C.2 秒","D.0.2 秒"],"ans":"C","tip":"G04 暂停指令中，X 参数单位为秒，X2.0 对应延时 2 秒，与 P 参数毫秒单位不同，编程时需注意单位区分，避免延时时长错误影响加工效果。","cate":"程序代码"}, {"q":"子程序调用组合 M98 P100 L3 的执行逻辑是？","opt":["A. 结束子程序","B. 调用 O100 子程序 1 次","C. 调用 O3 子程序 100 次","D. 调用 O100 子程序 3 次"],"ans":"D","tip":"M98 为子程序调用指令，P 指定子程序号，L 指定重复调用次数，该组合会连续调用 O100 号子程序 3 次，适合重复轮廓、阵列特征的简化编程，精简主程序结构。","cate":"程序代码"}, {"q":"子程序结束返回指令是？","opt":["A.M98","B.M99","C.M30","D.M02"],"ans":"B","tip":"M99 为子程序结束指令，执行后程序返回主程序中 M98 调用段的下一段继续执行，可搭配 L 参数实现循环调用，是模块化编程、重复特征加工的核心指令。","cate":"程序代码"}, {"q":"极坐标编程指令 G16 的作用是？","opt":["A. 用半径 + 角度定义坐标","B. 设定极坐标原点","C. 开启旋转功能","D. 设定工件坐标"],"ans":"A","tip":"G16 为极坐标编程指令，开启后 X 代表极径、Y 代表极角度，用极坐标方式定义点位坐标，适合圆周阵列孔、圆形轮廓的编程，大幅简化坐标计算。","cate":"程序代码"}, {"q":"取消极坐标编程的指令是？","opt":["A.G80","B.G15","C.G69","D.G16"],"ans":"B","tip":"G15 为极坐标取消指令，用于注销 G16 的极坐标编程模式，恢复直角坐标编程方式，通常在圆周阵列特征加工完成后使用，避免后续坐标解析错误。","cate":"程序代码"}, {"q":"高速高精加工模式 G05.1 Q1 的功能是？","opt":["A. 设定进给速度","B. 设定主轴转速","C. 开启刀具补偿","D. 开启前瞻平滑处理"],"ans":"D","tip":"G05.1 Q1 为 AI 前瞻控制指令，开启后系统会预读多段程序，自动优化进给速度与路径平滑度，减少机床冲击，适合复杂曲面、高速铣削的高精度加工。","cate":"程序代码"}, {"q":"取消高速高精模式的指令是？","opt":["A.G80","B.G05.1 Q0","C.G69","D.G05.1 Q1"],"ans":"B","tip":"G05.1 Q0 用于关闭 AI 前瞻高速高精模式，机床恢复普通插补模式，通常在曲面加工完成、进入普通钻孔 / 铣削工序时切换，降低系统运算负载。","cate":"程序代码"}, {"q":"G10 L10 P1 R120.5 指令的作用是？","opt":["A. 修改 G54 坐标系","B. 修改局部坐标","C. 修改 1 号刀长补偿值","D. 修改 1 号半径补偿值"],"ans":"C","tip":"G10 为可编程参数输入，L10 指定修改刀长补偿，P1 对应 1 号补偿号，R 为新的补偿值，该组合可在程序中自动修改刀长补偿，适配刀具磨损、对刀偏差的自动补偿。","cate":"程序代码"}, {"q":"G10 L12 P2 R8.0 指令的作用是？","opt":["A. 修改 2 号半径补偿值","B. 修改 2 号刀长补偿","C. 修改主轴转速","D. 修改 G55 坐标系"],"ans":"A","tip":"G10 搭配 L12 时用于修改刀具半径补偿值，P2 对应 2 号半径补偿号，R8.0 为新的半径数值，可实现刀具磨损自动补偿、多刀径自动适配，提升加工自动化程度。","cate":"程序代码"}, {"q":"等螺距螺纹铣削通常使用哪种插补组合？","opt":["A. 固定循环","B.G01 直线插补","C.G00 快速移动","D.G02/G03 螺旋插补"],"ans":"D","tip":"螺纹铣削采用 G02 或 G03 螺旋插补组合，XY 平面做圆周运动的同时 Z 轴同步进给一个螺距，配合单齿或多齿螺纹铣刀，可加工高精度、大直径的内外螺纹。","cate":"程序代码"}, {"q":"加工中心上电默认的主轴转速模式是？","opt":["A.G97 恒转速","B.G95 每转进给","C.G94 每分进给","D.G96 恒线速"],"ans":"A","tip":"加工中心上电默认 G97 恒转速模式，S 代码直接指定主轴每分钟转速，转速不受切削直径影响，适合绝大多数铣削、钻孔、攻丝等常规加工场景。","cate":"程序代码"}, {"q":"倒角加工常用的指令组合是？","opt":["A.G00 快速移动","B.G01 直线插补","C.G02 圆弧插补","D. 固定循环"],"ans":"B","tip":"倒角加工通常使用 G01 直线插补组合，通过 X、Y 轴同步移动形成 45 度或指定角度的直线倒角，也可搭配 C 参数直接指定倒角尺寸，简化轮廓拐角的编程。","cate":"程序代码"}, {"q":"圆角加工常用的指令组合是？","opt":["A.G02/G03 圆弧插补","B.G00 快速移动","C. 螺纹循环","D.G01 直线插补"],"ans":"A","tip":"圆角加工使用 G02 或 G03 圆弧插补指令，通过 R 参数指定圆角半径，在轮廓拐角处插入圆弧过渡，避免尖角应力集中，提升零件强度与表面质量。","cate":"程序代码"}, {"q":"型腔粗加工常用的走刀指令组合是？","opt":["A. 固定循环","B.G01 直线插补分层铣削","C.G02 螺旋插补","D.G00 快速铣削"],"ans":"B","tip":"型腔粗加工多采用 G01 直线插补搭配分层铣削，以等高方式逐层去除余量，配合顺铣走刀路径保证切削负载稳定，是模具、型腔类零件粗加工的主流方式。","cate":"程序代码"}, {"q":"G91 G28 X0 Y0 Z0 的执行逻辑是？","opt":["A. 三轴同时回参考点","B. 先 Z 轴再 XY 轴回零","C. 仅 Z 轴回零","D. 先 XY 轴再 Z 轴回零"],"ans":"A","tip":"该指令为增量模式下三轴同时返回参考点，执行时 X、Y、Z 三轴同步向参考点移动，到位后触发零点确认，适合程序结束或换刀前的整机回零操作。","cate":"程序代码"}, {"q":"钻孔循环中 R 点平面的含义是？","opt":["A. 工件表面位置","B. 初始安全平面","C. 快速转工进的位置","D. 孔底位置"],"ans":"C","tip":"R 点是固定循环中快速移动转为切削进给的分界点，刀具从初始平面快速移动到 R 点后，切换为 F 值指定的切削进给速度，兼顾加工效率与进刀安全。","cate":"程序代码"}, {"q":"多工件加工时，切换坐标系的标准写法是？","opt":["A.G55 G90 G00 X0 Y0","B.G10 G55","C.G52 G55","D.G91 G55"],"ans":"A","tip":"切换工件坐标系需搭配 G90 绝对坐标与 G00 移动指令，激活新坐标系后移动到目标位置，避免增量模式下坐标累加出错，保证工位切换的定位精度。","cate":"程序代码"}, {"q":"刀具长度补偿的建立时机通常在？","opt":["A. 孔底位置","B. 切削加工过程中","C.Z 轴快速接近工件前","D. 换刀后立即原地建立"],"ans":"C","tip":"刀长补偿通常在 Z 轴快速接近工件的移动段建立，通过 G43 搭配 Z 向移动逐步加载补偿值，避免原地加载导致坐标突变，保证接近工件的过程安全。","cate":"程序代码"}, {"q":"顺铣加工时，刀具旋转方向与进给方向的关系是？","opt":["A. 相同","B. 无关","C. 相反","D. 垂直"],"ans":"A","tip":"顺铣指刀具切削刃的旋转方向与进给方向相同，切削厚度从厚变薄，刀具磨损小、表面质量好，是精加工优先选择的切削方式，需配合 M03 主轴正转与对应进给方向。","cate":"程序代码"}, {"q":"逆铣加工的特点是？","opt":["A. 表面质量好","B. 适合粗加工余量不均的工件","C. 进给阻力小","D. 刀具磨损小"],"ans":"B","tip":"逆铣切削厚度从薄变厚，刀具切入冲击小，适合毛坯表面硬化、余量不均的粗加工场景，可保护刀具刃口，是粗铣工序常用的切削方式。","cate":"程序代码"}, {"q":"G89 镗孔循环与 G85 的核心区别是？","opt":["A. 主轴动作不同","B. 进给速度不同","C. 孔底有暂停延时","D. 退刀方式不同"],"ans":"C","tip":"G89 为精镗阶梯孔循环，动作逻辑与 G85 类似，均为工进工退，但 G89 到达孔底后会执行暂停延时，保证台阶底面光洁度，适合台阶孔、沉孔的精加工。","cate":"程序代码"}, {"q":"G88 镗孔循环的特点是？","opt":["A. 孔底主轴停止，手动退刀","B. 自动快速退刀","C. 螺旋镗削","D. 孔底让刀偏移"],"ans":"A","tip":"G88 镗孔循环刀具到达孔底后主轴停止，程序进入暂停状态，需手动移动刀具退出孔外后再启动程序，适合深孔、精密镗孔的手动排屑与尺寸检测场景。","cate":"程序代码"}, {"q":"镜像加工指令 G51.1 X0 的功能是？","opt":["A. 坐标系缩放","B. 沿 Y 轴镜像","C. 坐标系旋转","D. 沿 X 轴镜像编程坐标"],"ans":"D","tip":"G51.1 为可编程镜像指令，X0 指定镜像对称轴为 X 轴，开启后 Y 坐标值自动取反，实现对称零件的镜像加工，无需重复编写对称轮廓程序，提升编程效率。","cate":"程序代码"}, {"q":"取消镜像加工的指令是？","opt":["A.G51.1","B.G50.1","C.G80","D.G69"],"ans":"B","tip":"G50.1 为镜像功能取消指令，用于注销 G51.1 开启的坐标镜像模式，恢复原始坐标计算，对称特征加工完成后必须执行，避免后续加工路径镜像出错。","cate":"程序代码"}, {"q":"坐标系缩放指令 G51 X0 Y0 Z0 P1.5 的功能是？","opt":["A. 坐标旋转 1.5 度","B. 坐标缩小 1.5 倍","C. 坐标偏移 1.5mm","D. 坐标放大 1.5 倍"],"ans":"D","tip":"G51 为坐标系缩放指令，X0 Y0 Z0 为缩放中心，P1.5 为缩放比例，执行后所有编程坐标按比例放大 1.5 倍，适合比例缩放零件、模具型腔缩放等加工场景。","cate":"程序代码"}, {"q":"取消坐标系缩放的指令是？","opt":["A.G50","B.G51","C.G69","D.G40"],"ans":"A","tip":"G50 为坐标系缩放取消指令，注销 G51 的缩放功能，恢复原始坐标尺寸，缩放加工完成后必须及时取消，防止后续工序尺寸出现比例偏差。","cate":"程序代码"}, {"q":"单节执行模式下，程序每段执行后会？","opt":["A. 主轴停止","B. 暂停等待启动","C. 程序结束","D. 自动继续下一段"],"ans":"B","tip":"单节执行模式开启后，每执行完一段程序就会自动暂停，按下循环启动才会执行下一段，常用于程序首件调试、路径验证，及时发现编程错误避免撞机。","cate":"程序代码"}, {"q":"G43 与 G44 的核心区别是？","opt":["A. 左补偿与右补偿","B. 模态与非模态","C. 半径与长度补偿","D. 正向与反向刀长补偿"],"ans":"D","tip":"G43 为正向刀长补偿，补偿值叠加到 Z 轴坐标上；G44 为负向刀长补偿，从 Z 轴坐标减去补偿值，实际生产中 G43 使用更广泛，配合 H 代码实现刀具长度偏差补偿。","cate":"程序代码"}, {"q":"加工中心换刀时，必须处于开启状态的功能是？","opt":["A. 主轴定向","B. 冷却系统","C. 刀具补偿","D. 刀库旋转"],"ans":"A","tip":"换刀时主轴必须执行 M19 定向停止，保证刀柄键槽与刀爪位置对齐，避免换刀时碰撞损坏刀柄与主轴锥孔，是自动换刀的必要前提条件。","cate":"程序代码"}, {"q":"铣削平面时，优先选用的进给模式是？","opt":["A.G99 固定循环","B.G95 每转进给","C.G98 固定循环","D.G94 每分进给"],"ans":"D","tip":"平面铣削多采用 G94 每分钟进给模式，进给速度稳定可控，不受主轴转速波动影响，可根据刀具、材料直接设定进给速度，适配绝大多数铣削加工场景。","cate":"程序代码"}, {"q":"深孔加工采用啄钻循环的主要目的是？","opt":["A. 有效排屑保护钻头","B. 提升加工速度","C. 保证孔的位置度","D. 降低主轴负载"],"ans":"A","tip":"深孔加工时切屑不易排出，G83 啄钻循环每次钻削一定深度就退回排屑，可避免切屑堵塞导致钻头折断，同时充分冷却钻头，提升深孔加工的刀具寿命与孔质量。","cate":"程序代码"}, {"q":"精铣轮廓时，刀具补偿号内的数值应设置为？","opt":["A. 刀具直径","B. 刀具理论半径","C. 任意数值","D. 刀具实际测量半径"],"ans":"D","tip":"精铣轮廓时，半径补偿值需输入刀具实际测量的半径值，而非理论值，可抵消刀具刃磨、磨损带来的尺寸偏差，保证加工轮廓的尺寸精度符合公差要求。","cate":"程序代码"}, {"q":"G17 G41 D01 指令组合必须在哪个平面生效？","opt":["A.XZ 平面","B.XY 平面","C.YZ 平面","D. 任意平面"],"ans":"B","tip":"G41 半径左补偿在 G17 XY 平面下生效，补偿偏移计算基于 XY 平面坐标，若切换到 G18/G19 平面，半径补偿会对应到 XZ/YZ 平面，编程时需注意平面对应关系。","cate":"程序代码"}, {"q":"批量加工中，程序结束后自动循环的指令是？","opt":["A.M00","B.M02","C.M01","D.M30"],"ans":"D","tip":"M30 指令执行后程序结束并自动返回程序开头，配合机床自动运行模式可实现零件批量加工的循环启动，无需手动复位程序，提升自动化加工效率。","cate":"程序代码"}, {"q":"G00 快速移动的速度由什么决定？","opt":["A. 机床参数设定","B.S 代码设定","C. 手动调节","D.F 代码设定"],"ans":"A","tip":"G00 快速移动速度由机床系统参数预设，不可通过 F 代码修改，移动时多采用点位控制非直线插补，编程时需注意避开夹具与工件，防止快速移动碰撞。","cate":"程序代码"}, {"q":"切削进给速度 F 值的大小直接影响？","opt":["A. 工件坐标系","B. 加工效率与表面质量","C. 主轴转速","D. 刀具长度"],"ans":"B","tip":"进给速度 F 是核心工艺参数，数值越大加工效率越高，但表面光洁度会下降、刀具磨损加快；数值越小表面质量越好但效率降低，需根据材料、刀具、工序合理匹配。","cate":"程序代码"}, {"q":"固定循环的模态特性是指？","opt":["A. 不能重复使用","B. 仅当前段有效","C. 必须手动取消","D. 一次指定持续生效直到取消"],"ans":"D","tip":"固定循环指令为模态指令，一次指定后持续保持生效状态，后续孔位只需写入坐标值即可重复执行循环动作，无需重复写循环指令，大幅简化多孔加工程序。","cate":"程序代码"}, {"q":"G99 G81 模式下，编写新的孔位坐标后机床会？","opt":["A. 自动执行完整钻孔循环","B. 快速移动不钻孔","C. 取消钻孔循环","D. 程序报错"],"ans":"A","tip":"G81 为模态钻孔循环，指定后持续生效，写入新的 XY 坐标后，机床会自动执行 “快速到 R 点→工进钻削→退回 R 点” 的完整循环，适合批量多孔连续加工。","cate":"程序代码"}, {"q":"加工内轮廓时，刀具半径补偿值应如何设置保证尺寸？","opt":["A. 大于刀具实际半径","B. 任意设置","C. 等于刀具实际半径","D. 小于刀具实际半径"],"ans":"C","tip":"加工内轮廓时，半径补偿值设为刀具实际半径，刀具中心向内偏移一个半径，保证加工出的内轮廓尺寸与编程尺寸一致，精加工可通过微调补偿值修正尺寸偏差。","cate":"程序代码"}, {"q":"M03 S2000 与 M04 S2000 的区别是？","opt":["A. 进给速度不同","B. 转速不同","C. 冷却开关不同","D. 主轴转向不同"],"ans":"D","tip":"M03 控制主轴正转，M04 控制主轴反转，S 代码仅指定转速大小与转向无关，实际加工中需根据刀具旋向、切削方式选择正确的主轴转向，避免打刀。","cate":"程序代码"}, {"q":"Z 轴负方向通常代表的加工动作是？","opt":["A. 抬刀远离工件","B. 横向移动","C. 进刀接近工件","D. 主轴旋转"],"ans":"C","tip":"立式加工中心中，Z 轴正方向为抬刀远离工件，负方向为进刀靠近工件，钻孔、铣削深度加工均为 Z 轴负向进给，编程时需注意方向避免撞刀。","cate":"程序代码"}, {"q":"编写圆弧插补时，I、J 参数的含义是？","opt":["A. 圆心绝对坐标","B. 圆心相对于起点的增量坐标","C. 圆弧半径","D. 圆弧终点坐标"],"ans":"B","tip":"圆弧插补的 I、J 为圆心增量参数，I 对应 X 方向、J 对应 Y 方向，数值为圆心坐标减去圆弧起点坐标的增量值，相比 R 参数可加工整圆，路径更精准。","cate":"程序代码"}, {"q":"整圆加工必须使用哪种参数方式？","opt":["A. 极坐标","B. 直接写终点坐标","C.R 参数","D.I、J 增量参数"],"ans":"D","tip":"加工 360 度整圆时，R 参数无法定义整圆，必须使用 I、J 圆心增量参数指定圆心位置，通过圆弧起点与圆心确定整圆轨迹，是铣削整圆、内孔的标准编程方式。","cate":"程序代码"}, {"q":"子程序嵌套调用指的是？","opt":["A. 子程序中再调用其他子程序","B. 主程序调用子程序","C. 循环调用子程序","D. 多次调用同一个子程序"],"ans":"A","tip":"子程序嵌套是指在子程序内部再次调用其他子程序，数控系统通常支持最多 4~8 层嵌套，可实现多层模块化编程，适配复杂零件的分层、分工序加工逻辑。","cate":"程序代码"}, {"q":"G52 局部坐标系的生效范围是？","opt":["A. 所有坐标系通用","B. 仅机床坐标生效","C. 当前工件坐标系内","D. 全局永久生效"],"ans":"C","tip":"G52 局部坐标系仅在当前激活的工件坐标系内生效，切换 G54/G55 等坐标系后局部坐标失效，用于在单个工件坐标系内拆分多个加工区域，简化坐标计算。","cate":"程序代码"}, {"q":"刀具补偿号 H 与 D 的区别是？","opt":["A.H 对应半径，D 对应刀长","B.H 对应刀长，D 对应半径","C.H 对应工件坐标，D 对应刀补","D. 无区别可通用"],"ans":"B","tip":"H 地址专门用于调用刀长补偿参数，搭配 G43/G44 使用；D 地址用于调用刀具半径补偿参数，搭配 G41/G42 使用，二者编号可相同但对应参数独立存储，不可混用。","cate":"程序代码"}, {"q":"加工中心程序的标准结构顺序是？","opt":["A. 初始化→换刀→加工→收尾回零","B. 加工→初始化→换刀→收尾","C. 换刀→加工→初始化→收尾","D. 收尾→加工→换刀→初始化"],"ans":"A","tip":"标准加工程序遵循 “坐标系 / 平面初始化→主轴启动冷却开启→切削加工→取消补偿→主轴冷却关闭→回零程序结束” 的顺序，逻辑清晰且符合安全规范，避免动作顺序错误导致事故。","cate":"程序代码"}, {"q":"刀具半径补偿取消的正确方式是？","opt":["A.G42","B.G41","C.G43","D.G40"],"ans":"D","tip":"G40用于取消刀具半径补偿，必须在直线段执行，避免在圆弧段取消导致过切。","cate":"程序代码"}, {"q":"G41刀具半径左补偿的判断依据是？","opt":["A.沿进给方向看刀具在左侧","B.主轴顺时针旋转","C.主轴逆时针旋转","D.沿进给方向看刀具在右侧"],"ans":"A","tip":"G41左补偿需沿进给方向观察，刀具位于工件轮廓左侧时使用。","cate":"程序代码"}, {"q":"G96恒线速控制中S代码的单位是？","opt":["A.mm/min","B.m/min","C.r/min","D.mm/r"],"ans":"B","tip":"G96模式下S指定恒线速度（米/分钟），适用于车削端面保证表面质量。","cate":"程序代码"}, {"q":"M07指令的功能是？","opt":["A.开启液态切削液","B.关闭切削液","C.开启雾状切削液","D.主轴正转"],"ans":"C","tip":"M07激活雾状冷却，适合微量润滑或难加工材料的高温冷却。","cate":"程序代码"}, {"q":"G92设定的坐标系属于？","opt":["A.局部坐标系","B.临时坐标系","C.机床坐标系","D.永久坐标系"],"ans":"B","tip":"G92通过程序临时定义工件原点，重启或复位后失效，适合多工位加工。","cate":"程序代码"}, {"q":"G27指令的作用是？","opt":["A.从参考点返回","B.开启镜像","C.设定局部坐标系","D.返回参考点检查"],"ans":"D","tip":"G27验证刀具是否准确抵达参考点，未到达则触发报警，确保换刀安全。","cate":"程序代码"}, {"q":"G29指令必须与哪个指令配合使用？","opt":["A.G28","B.G00","C.G54","D.G01"],"ans":"A","tip":"G29需先执行G28返回参考点，再移动到指定目标位置，避免路径干涉。","cate":"程序代码"}, {"q":"G61精确停止模式的适用场景是？","opt":["A.粗加工提高效率","B.深孔钻削","C.快速定位","D.精加工保证精度"],"ans":"D","tip":"G61使每段程序结束后减速至零，确保轮廓精度，常用于精加工。","cate":"程序代码"}, {"q":"G64连续路径模式会？","opt":["A.自动关闭补偿","B.保持段间连续运动","C.每段结束减速","D.忽略轮廓精度"],"ans":"B","tip":"G64允许刀具在不影响精度的前提下连续运动，提升加工效率。","cate":"程序代码"}, {"q":"G70指令通常用于？","opt":["A.外圆粗加工","B.切槽循环","C.螺纹切削","D.端面精加工"],"ans":"D","tip":"G70执行G71/G72粗加工后的精加工，保证最终尺寸精度。","cate":"程序代码"}, {"q":"G71外圆粗车循环的走刀方向是？","opt":["A.轴向进刀径向切削","B.径向进刀轴向切削","C.螺旋进刀","D.双向同时切削"],"ans":"B","tip":"G71沿径向分层进刀，轴向切削，适合棒料外圆粗加工。","cate":"程序代码"}, {"q":"G75切槽循环中Q参数表示？","opt":["A.退刀量","B.进给速度","C.主轴转速","D.每次切深量"],"ans":"D","tip":"G75的Q值设定每次径向切入深度，避免刀具过载断裂。","cate":"程序代码"}, {"q":"增量轴U在数控车中对应哪个轴？","opt":["A.主轴增量","B.X轴增量","C.Y轴增量","D.Z轴增量"],"ans":"B","tip":"U、V、W分别对应X、Y、Z轴的增量坐标，如U10表示X轴正向移动10mm。","cate":"程序代码"}, {"q":"M13指令的组合功能是？","opt":["A.主轴正转+卡盘夹紧","B.主轴停止+切削液关","C.主轴反转+切削液开","D.主轴正转+切削液开"],"ans":"D","tip":"M13合并M03（主轴正转）和M08（切削液开），简化连续切削程序。","cate":"程序代码"}, {"q":"M41主轴档位切换的作用是？","opt":["A.提高转速","B.降低振动","C.增大扭矩","D.切换冷却方式"],"ans":"C","tip":"M41切换至低速档，增加输出扭矩，适合重切削或大直径工件。","cate":"程序代码"}, {"q":"G31跳过功能的典型应用是？","opt":["A.螺纹切削","B.工件坐标系设定","C.刀具长度测量","D.探头检测位置"],"ans":"D","tip":"G31连接探头触发信号，立即停止进给并记录坐标，用于工件找正或尺寸校准。","cate":"程序代码"}, {"q":"G53指令的功能是？","opt":["A.选择机床坐标系","B.开启缩放","C.设定局部坐标系","D.取消镜像"],"ans":"A","tip":"G53直接调用机床坐标系，用于安全位置移动，不受G54-G59影响。","cate":"程序代码"}, {"q":"G04暂停指令的时间单位可以是？","opt":["A.转或毫米","B.赫兹或千赫","C.秒或毫秒","D.分钟或小时"],"ans":"C","tip":"G04 X（秒）或P（毫秒）设定暂停时间，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"M19主轴定向准停的角度由谁控制？","opt":["A.H代码","B.系统参数","C.T代码","D.S代码"],"ans":"B","tip":"M19通过系统参数设定主轴定向角度，确保换刀或背镗时方位准确。","cate":"程序代码"}, {"q":"G43.1刀具长度补偿的微调控件是？","opt":["A.D代码","B.P代码","C.Q代码","D.H代码"],"ans":"D","tip":"G43.1配合H代码实现刀具长度补偿的动态调整，适合精密加工。","cate":"程序代码"}, {"q":"G80取消固定循环后，模态指令会？","opt":["A.保持原状态","B.自动关闭","C.恢复G01","D.恢复G00"],"ans":"C","tip":"G80取消循环后，系统默认恢复G01直线插补模态，需重新指定运动指令。","cate":"程序代码"}, {"q":"G84攻丝循环中主轴转向变化是？","opt":["A.正转攻入，反转退出","B.正转攻入，正转退出","C.反转攻入，正转退出","D.反转攻入，反转退出"],"ans":"A","tip":"G84右旋攻丝时主轴正转攻入，到位后反转退出，形成标准螺纹。","cate":"程序代码"}, {"q":"G76精镗循环的让刀方向是？","opt":["A.随机方向","B.平行于主轴轴线","C.垂直于进给方向","D.沿圆弧切线"],"ans":"C","tip":"G76到位后主轴定向，刀具向垂直进给方向让刀，避免退刀划伤孔壁。","cate":"程序代码"}, {"q":"G50指令在车床上的作用是？","opt":["A.调用子程序","B.设定最高转速限制","C.取消坐标系","D.开启镜像"],"ans":"B","tip":"G50 S_限制主轴最高转速，防止恒线速加工时转速过高引发危险。","cate":"程序代码"}, {"q":"G96恒线速模式下，转速随直径变化？","opt":["A.与直径无关","B.直径减小转速降低","C.直径减小转速升高","D.转速恒定不变"],"ans":"C","tip":"G96保持切削线速度恒定，工件直径越小，主轴转速自动提高。","cate":"程序代码"}, {"q":"M08与M07的区别在于？","opt":["A.流量大小","B.适用材料","C.喷射角度","D.冷却液形态（液态/雾状）"],"ans":"D","tip":"M08开启液态切削液，M07开启雾状冷却，适应不同加工需求。","cate":"程序代码"}, {"q":"G28返回参考点时，中间需经过？","opt":["A.预设中间点","B.任意路径","C.机床原点","D.最短路径"],"ans":"A","tip":"G28可指定中间点（如G28 X100 Z100），确保刀具避开夹具安全返回。","cate":"程序代码"}, {"q":"G65宏程序调用中，参数传递通过？","opt":["A.P代码","B.#变量","C.H代码","D.Q代码"],"ans":"B","tip":"G65调用宏程序时，通过#1-#33等变量传递参数，实现灵活加工。","cate":"程序代码"}, {"q":"G68坐标旋转的基准点是？","opt":["A.程序原点","B.机床原点","C.工件原点","D.当前刀具位置"],"ans":"C","tip":"G68以当前工件坐标系原点为基准旋转，所有坐标按角度重新计算。","cate":"程序代码"}, {"q":"G51.1镜像功能中，对称轴由谁指定？","opt":["A.坐标值","B.T代码","C.G代码","D.M代码"],"ans":"A","tip":"G51.1 X0 表示以X轴为对称轴镜像，坐标值决定对称轴位置。","cate":"程序代码"}, {"q":"G10可编程数据输入可修改？","opt":["A.进给速度","B.程序段号","C.主轴转速","D.刀具补偿值"],"ans":"D","tip":"G10允许在程序中直接写入刀具补偿或坐标系参数，实现自动化调整。","cate":"程序代码"}, {"q":"G43 H01 Z100.0的含义是？","opt":["A.开启镜像","B.调用1号刀长补偿","C.调用1号半径补偿","D.设定Z轴零点"],"ans":"B","tip":"G43激活刀具长度正补偿，H01指定1号补偿寄存器，Z100.0为目标位置。","cate":"程序代码"}, {"q":"G80与G49的共同点是？","opt":["A.都取消补偿","B.都开启补偿","C.都调用子程序","D.都取消循环"],"ans":"A","tip":"G80取消固定循环，G49取消刀具长度补偿，两者均用于终止特定模态。","cate":"程序代码"}, {"q":"G41补偿建立时，刀具移动距离应？","opt":["A.任意距离","B.大于刀具半径","C.等于刀具半径","D.小于刀具半径"],"ans":"B","tip":"建立半径补偿时，移动距离需大于刀具半径，避免过切或报警。","cate":"程序代码"}, {"q":"G90绝对坐标编程中，坐标值是？","opt":["A.相对于工件原点","B.随机值","C.相对于机床原点","D.相对于上一点"],"ans":"A","tip":"G90模式下所有坐标以工件原点为基准，编程直观不易出错。","cate":"程序代码"}, {"q":"G91增量坐标编程中，X10表示？","opt":["A.移动到X10","B.向X正方向移动10","C.快速移动10","D.向X负方向移动10"],"ans":"B","tip":"G91模式下X10表示当前点向X轴正方向移动10单位，与前一点位置相关。","cate":"程序代码"}, {"q":"M30程序结束后，光标会？","opt":["A.返回程序头","B.跳转到M02","C.随机位置","D.停留在末尾"],"ans":"A","tip":"M30结束程序并复位光标至开头，适合批量循环加工。","cate":"程序代码"}, {"q":"M01选择性暂停生效的条件是？","opt":["A.S代码大于500","B.程序段号大于100","C.冷却液开启","D.面板选择停止开关ON"],"ans":"D","tip":"M01仅在操作面板“选择停止”开关打开时生效，用于调试或抽检。","cate":"程序代码"}, {"q":"G04 X2.5表示暂停？","opt":["A.2.5秒","B.2.5分钟","C.2.5毫秒","D.2.5转"],"ans":"A","tip":"G04 X单位为秒，P单位为毫秒，X2.5即暂停2.5秒。","cate":"程序代码"}, {"q":"G17/G18/G19选择圆弧平面的依据是？","opt":["A.机床结构","B.工件材料","C.刀具类型","D.加工方向"],"ans":"D","tip":"G17选XY平面（立式铣床），G18选XZ平面（车床），G19选YZ平面。","cate":"程序代码"}, {"q":"G41与G42切换时需先执行？","opt":["A.M30程序结束","B.M05主轴停止","C.G40取消补偿","D.G00快速移动"],"ans":"C","tip":"切换左右补偿前必须用G40取消当前补偿，否则会导致过切或报警。","cate":"程序代码"}, {"q":"G92 X0 Y0 Z0设定后，刀具位置被视为？","opt":["A.安全点","B.工件原点","C.机床原点","D.参考点"],"ans":"B","tip":"G92将当前刀具位置强制定义为工件原点，不改变机床实际坐标。","cate":"程序代码"}, {"q":"G96恒线速加工端面时，转速变化是？","opt":["A.中心转速低，边缘转速高","B.全程恒定","C.随机变化","D.中心转速高，边缘转速低"],"ans":"D","tip":"端面加工时，刀具越靠近中心（直径小），主轴转速自动提高以保持线速度恒定。","cate":"程序代码"}, {"q":"G97 S1000表示主轴转速？","opt":["A.1000 mm/min","B.1000 m/min","C.1000 r/min","D.1000 mm/r"],"ans":"C","tip":"G97模式下S代码直接指定主轴转速（转/分钟），是默认转速模式。","cate":"程序代码"}, {"q":"M06 T02的执行顺序是？","opt":["A.先换2号刀","B.先选2号刀再换刀","C.无效指令","D.直接换当前刀"],"ans":"B","tip":"T02选择2号刀，M06执行换刀，通常T与M06配合使用完成自动换刀。","cate":"程序代码"}, {"q":"G43 H05 Z50.0中，Z50.0是？","opt":["A.补偿前原始位置","B.刀具长度","C.补偿后目标位置","D.安全高度"],"ans":"C","tip":"Z50.0为应用长度补偿后的最终Z轴位置，实际移动量=Z值+补偿值。","cate":"程序代码"}, {"q":"G80取消循环后，需重新指定？","opt":["A.进给速度","B.主轴转速","C.刀具补偿","D.运动指令（G00/G01）"],"ans":"D","tip":"G80终止固定循环后，必须重新指定G00/G01等运动指令才能继续移动。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值表示？","opt":["A.主轴转速","B.切削深度","C.螺距","D.进给速度"],"ans":"C","tip":"攻丝时F值等于螺距（如M8×1.25，F1.25），确保螺纹牙型正确。","cate":"程序代码"}, {"q":"G76精镗循环的Q参数表示？","opt":["A.进给速度","B.孔底让刀量","C.每次切深","D.主轴转速"],"ans":"B","tip":"G76的Q值设定孔底定向让刀距离，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 X200 Z300的含义是？","opt":["A.设定刀具起点","B.设定工件坐标系","C.限制主轴最高转速","D.开启镜像"],"ans":"C","tip":"G50 S2000限制主轴最高转速为2000r/min，防止恒线速加工超速。","cate":"程序代码"}, {"q":"G96 S200中，200的单位是？","opt":["A.m/min","B.mm/min","C.r/min","D.mm/r"],"ans":"A","tip":"G96模式下S200表示切削线速度为200米/分钟，适用于车削加工。","cate":"程序代码"}, {"q":"M07与M08同时使用时，结果是？","opt":["A.仅M08生效","B.两种冷却同时开启","C.报警","D.仅M07生效"],"ans":"B","tip":"M07（雾状）和M08（液态）可同时激活，增强冷却效果，但需确认机床支持。","cate":"程序代码"}, {"q":"G28 U0 W0表示？","opt":["A.返回参考点（增量模式）","B.取消补偿","C.移动到原点","D.开启镜像"],"ans":"A","tip":"G28 U0 W0以增量方式返回参考点，U0/W0表示当前点即为参考点。","cate":"程序代码"}, {"q":"G65 P1234 A10 B20中，A10表示？","opt":["A.进给速度","B.刀具号","C.主轴转速","D.传递给#1变量的值"],"ans":"D","tip":"G65调用宏程序时，A/B/C等字母对应#1/#2/#3变量，A10即#1=10。","cate":"程序代码"}, {"q":"G68 X0 Y0 R45表示？","opt":["A.镜像45°","B.平移45mm","C.绕原点旋转45°","D.缩放45%"],"ans":"C","tip":"G68以X0 Y0为旋转中心，R45设定旋转角度45度，所有坐标按此旋转。","cate":"程序代码"}, {"q":"G51.1 X10表示？","opt":["A.旋转10°","B.平移10mm","C.缩放10倍","D.以X10为对称轴镜像"],"ans":"D","tip":"G51.1 X10以X=10的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L2 P1 X100 Y100表示？","opt":["A.调用子程序","B.修改刀具补偿","C.设定G54原点偏置","D.开启循环"],"ans":"C","tip":"G10 L2 P1设置G54坐标系的X/Y偏置值，实现坐标系自动偏移。","cate":"程序代码"}, {"q":"G43 H01 Z100.0执行后，刀具实际位置是？","opt":["A.仅Z100","B.Z100+补偿值","C.Z100-补偿值","D.随机位置"],"ans":"B","tip":"G43为正补偿，实际Z位置=编程Z值+补偿寄存器中的长度值。","cate":"程序代码"}, {"q":"G49取消长度补偿后，H代码？","opt":["A.变为负值","B.随机变化","C.仍保留原值","D.自动清零"],"ans":"C","tip":"G49仅取消补偿功能，H寄存器中的数值保持不变，下次调用仍有效。","cate":"程序代码"}, {"q":"G41 D02中，D02表示？","opt":["A.2号主轴档位","B.2号半径补偿值","C.2号刀具","D.2号长度补偿"],"ans":"B","tip":"D代码指定刀具半径补偿号，D02调用2号补偿寄存器的半径值。","cate":"程序代码"}, {"q":"G90 G00 X100 Y100表示？","opt":["A.直线插补到(100,100)","B.增量移动100","C.暂停100秒","D.快速定位到(100,100)"],"ans":"D","tip":"G90绝对坐标下，G00 X100 Y100使刀具快速移动到工件坐标系的(100,100)点。","cate":"程序代码"}, {"q":"G91 G01 X50 F200表示？","opt":["A.向X正方向移动50","B.主轴转速200","C.移动到X50","D.暂停50秒"],"ans":"A","tip":"G91增量模式下，G01 X50使刀具从当前位置向X轴正方向移动50单位。","cate":"程序代码"}, {"q":"M30与M02的核心区别是？","opt":["A.是否换刀","B.是否返回程序头","C.是否关闭冷却液","D.是否关闭主轴"],"ans":"B","tip":"M30结束程序并复位至开头，M02仅结束不复位，适合单次运行。","cate":"程序代码"}, {"q":"M01与M00的区别在于？","opt":["A.是否受面板开关控制","B.是否关闭冷却液","C.是否暂停主轴","D.是否换刀"],"ans":"A","tip":"M00无条件暂停，M01仅在“选择停止”开关ON时暂停，用于调试。","cate":"程序代码"}, {"q":"G04 P1500表示暂停？","opt":["A.1500秒","B.1500转","C.1.5分钟","D.1.5秒"],"ans":"D","tip":"G04 P_单位为毫秒，P1500即暂停1500毫秒（1.5秒）。","cate":"程序代码"}, {"q":"G17 G02 X50 Y50 I20 J0表示？","opt":["A.三维螺旋","B.XZ平面逆时针圆弧","C.XY平面顺时针圆弧","D.YZ平面直线"],"ans":"C","tip":"G17选XY平面，G02顺时针圆弧，I20 J0表示圆心在X方向偏移20。","cate":"程序代码"}, {"q":"G41 G01 X100 Y100 D01中，D01的作用是？","opt":["A.调用1号半径补偿","B.设定进给速度","C.指定刀具号","D.选择主轴转速"],"ans":"A","tip":"D01指定使用1号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X150 Z200设定后，若刀具当前位置是X50 Z50，则工件原点在？","opt":["A.机床坐标(X50,Z50)","B.机床坐标(X100,Z150)","C.机床坐标(X150,Z200)","D.随机位置"],"ans":"C","tip":"G92将当前点（X50,Z50）强制定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X150,Z200)。","cate":"程序代码"}, {"q":"G96 S150在直径50mm处的主轴转速是？","opt":["A.150 r/min","B.955 r/min","C.477 r/min","D.318 r/min"],"ans":"B","tip":"转速n=(1000×S)/(π×D)=(1000×150)/(3.14×50)≈955 r/min，符合恒线速公式。","cate":"程序代码"}, {"q":"G97 S800与G96 S800的区别是？","opt":["A.前者固定转速，后者固定线速度","B.前者固定线速度，后者固定转速","C.无法比较","D.两者完全相同"],"ans":"A","tip":"G97 S800为主轴恒转速800r/min，G96 S800为切削线速度800m/min（转速随直径变化）。","cate":"程序代码"}, {"q":"M06 T03 M03 S1000的正确执行流程是？","opt":["A.换刀→选3号刀→主轴正转","B.选3号刀→换刀→主轴正转1000r/min","C.主轴正转→选3号刀→换刀","D.无效指令"],"ans":"B","tip":"T03选择刀具，M06执行换刀，M03 S1000启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H03 Z-50.0中，若H03=5.0，则实际Z深度是？","opt":["A.-55.0","B.0","C.-45.0","D.-50.0"],"ans":"C","tip":"G43正补偿：实际深度=编程值+补偿值=-50.0+5.0=-45.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若直接执行G01，系统会？","opt":["A.正常执行直线插补","B.执行快速移动","C.报警","D.调用子程序"],"ans":"A","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴反转退出是因为？","opt":["A.保护刀具","B.避免乱扣","C.提高转速","D.减少热量"],"ans":"B","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向的目的是？","opt":["A.简化编程","B.降低振动","C.提高转速","D.让刀避免划伤"],"ans":"D","tip":"主轴定向后刀具固定方位，向安全方向让刀，确保孔壁光洁度。","cate":"程序代码"}, {"q":"G50 S2500限制的是？","opt":["A.最大切削深度","B.最高主轴转速","C.最大刀具半径","D.最快进给速度"],"ans":"B","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域转速过高。","cate":"程序代码"}, {"q":"G96 S120在直径20mm处的转速约为？","opt":["A.1910 r/min","B.120 r/min","C.955 r/min","D.382 r/min"],"ans":"A","tip":"n=(1000×120)/(3.14×20)≈1910 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07开启的冷却方式是？","opt":["A.油气冷却","B.液态冷却","C.低温冷却","D.雾状冷却"],"ans":"D","tip":"M07激活雾状切削液，适合微量润滑或高温合金加工。","cate":"程序代码"}, {"q":"G28 X0 Y0 Z0的正确理解是？","opt":["A.移动到原点","B.返回参考点（经过原点）","C.取消所有补偿","D.开启镜像"],"ans":"B","tip":"G28使刀具先快速移动到X0 Y0 Z0（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P2000 A50 B30中，#2变量的值是？","opt":["A.50","B.2000","C.0","D.30"],"ans":"D","tip":"G65调用宏程序时，A/B/C对应#1/#2/#3，B30即#2=30。","cate":"程序代码"}, {"q":"G68 R30表示？","opt":["A.镜像30°","B.缩放30%","C.旋转30度","D.平移30mm"],"ans":"C","tip":"G68的R参数指定旋转角度，R30表示所有坐标绕当前原点旋转30度。","cate":"程序代码"}, {"q":"G51.1 Y0表示？","opt":["A.以Y轴为对称轴镜像","B.缩放Y轴","C.平移Y轴","D.旋转Y轴"],"ans":"A","tip":"G51.1 Y0以Y=0的直线为对称轴，生成关于Y轴对称的加工路径。","cate":"程序代码"}, {"q":"G10 L20 P2 X-100表示？","opt":["A.开启循环","B.修改2号刀补","C.调用子程序2000","D.设置G55的X偏置为-100"],"ans":"D","tip":"G10 L20 P2设置G55坐标系（P2对应G55），X-100为X轴偏置值。","cate":"程序代码"}, {"q":"G44 H02 Z100.0中，若H02=-3.0，实际位置是？","opt":["A.Z100.0","B.Z103.0","C.Z-3.0","D.Z97.0"],"ans":"B","tip":"G44为负补偿，实际位置=编程值+补偿值=100.0+(-3.0)=103.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，刀具长度补偿值？","opt":["A.清零","B.随机变化","C.保持不变","D.变为负值"],"ans":"C","tip":"G49仅关闭补偿功能，H寄存器中的数值仍保留，供下次调用。","cate":"程序代码"}, {"q":"G41 D03中，D03的数值来自？","opt":["A.刀具半径补偿表","B.刀具长度表","C.进给参数","D.主轴参数"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，D03对应表中第3号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X200 Y150 F300表示？","opt":["A.快速定位到(200,150)","B.暂停300秒","C.直线插补到(200,150)，进给300mm/min","D.增量移动200"],"ans":"C","tip":"G90绝对坐标下，G01以300mm/min进给率直线移动到(200,150)。","cate":"程序代码"}, {"q":"G91 G00 X-30 Y20表示？","opt":["A.暂停30秒","B.移动到(-30,20)","C.主轴转速20","D.X负移30，Y正移20"],"ans":"D","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动30，Y正方向移动20。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.程序开头","B.随机位置","C.下一程序段","D.程序末尾"],"ans":"A","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效的前提是？","opt":["A.刀具更换","B.面板选择停止开关ON","C.冷却液关闭","D.主轴停止"],"ans":"B","tip":"M01为选择性暂停，仅当操作面板“选择停止”按钮按下时生效。","cate":"程序代码"}, {"q":"G04 X0.5表示暂停？","opt":["A.0.5转","B.0.5毫秒","C.0.5分钟","D.0.5秒"],"ans":"D","tip":"G04 X_单位为秒，X0.5即暂停0.5秒，常用于孔底光整。","cate":"程序代码"}, {"q":"G17 G03 X80 Y80 I-20 J0表示？","opt":["A.三维螺旋","B.XY平面逆时针圆弧","C.XZ平面顺时针圆弧","D.YZ平面直线"],"ans":"B","tip":"G17选XY平面，G03逆时针圆弧，I-20 J0表示圆心在X方向负偏移20。","cate":"程序代码"}, {"q":"G41 G00 X50 Y50 D02中，D02的作用是？","opt":["A.设定进给速度","B.选择主轴转速","C.指定刀具号","D.调用2号半径补偿"],"ans":"D","tip":"D02指定使用2号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X0 Z0设定后，若刀具实际位置是X150 Z200，则工件原点在？","opt":["A.随机位置","B.机床坐标(X150,Z200)","C.机床坐标(X-150,Z-200)","D.机床坐标(X0,Z0)"],"ans":"B","tip":"G92将当前点（X150,Z200）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X150,Z200)。","cate":"程序代码"}, {"q":"G96 S180在直径40mm处的转速约为？","opt":["A.180 r/min","B.358 r/min","C.716 r/min","D.1432 r/min"],"ans":"D","tip":"n=(1000×180)/(3.14×40)≈1432 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S1200与G96 S1200在直径100mm处的转速分别是？","opt":["A.1200 r/min 和 382 r/min","B.1200 r/min 和 1200 r/min","C.382 r/min 和 1200 r/min","D.无法确定"],"ans":"A","tip":"G97固定1200r/min；G96下n=(1000×1200)/(3.14×100)≈382 r/min。","cate":"程序代码"}, {"q":"M06 T05 M04 S800的正确执行流程是？","opt":["A.主轴反转→选5号刀→换刀","B.选5号刀→换刀→主轴反转800r/min","C.换刀→选5号刀→主轴反转","D.无效指令"],"ans":"B","tip":"T05选择刀具，M06执行换刀，M04 S800启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H04 Z-30.0中，若H04=2.5，实际Z深度是？","opt":["A.-27.5","B.-30.0","C.-32.5","D.0"],"ans":"A","tip":"G43正补偿：实际深度=编程值+补偿值=-30.0+2.5=-27.5（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G02，系统会？","opt":["A.调用子程序","B.报警（无循环）","C.执行快速移动","D.正常执行圆弧插补"],"ans":"B","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须等于？","opt":["A.主轴转速","B.切削深度","C.导程","D.螺距"],"ans":"D","tip":"攻丝时F值等于螺纹螺距（如M10×1.5，F1.5），确保螺纹牙型正确。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过大可能导致？","opt":["A.进给过快","B.让刀不足划伤孔壁","C.主轴过载","D.刀具断裂"],"ans":"B","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S3000限制的是？","opt":["A.最大切削深度3000mm","B.最快进给速度3000mm/min","C.最高主轴转速3000r/min","D.最大刀具半径3000mm"],"ans":"C","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S200在直径10mm处的转速约为？","opt":["A.200 r/min","B.3183 r/min","C.1273 r/min","D.6366 r/min"],"ans":"D","tip":"n=(1000×200)/(3.14×10)≈6366 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却效果是？","opt":["A.雾状+液态混合","B.仅雾状","C.无效","D.仅液态"],"ans":"A","tip":"M07（雾状）和M08（液态）可同时激活，增强冷却效果，需确认机床支持。","cate":"程序代码"}, {"q":"G28 U10 W20表示？","opt":["A.开启镜像","B.移动到(10,20)","C.先增量移动(10,20)再返回参考点","D.取消补偿"],"ans":"C","tip":"G28 U10 W20先以增量方式移动X10 Z20，再返回参考点。","cate":"程序代码"}, {"q":"G65 P3000 C40表示？","opt":["A.刀具号40","B.主轴转速40","C.进给速度40","D.#3=40"],"ans":"D","tip":"G65调用宏程序时，C对应#3变量，C40即#3=40。","cate":"程序代码"}, {"q":"G68 X50 Y50 R-45表示？","opt":["A.绕(50,50)旋转-45°","B.缩放45%","C.镜像45°","D.平移(-45,-45)"],"ans":"A","tip":"G68以(X50,Y50)为旋转中心，R-45设定顺时针旋转45度。","cate":"程序代码"}, {"q":"G51.1 X-20表示？","opt":["A.平移X轴20mm","B.以X=-20为对称轴镜像","C.缩放X轴20%","D.旋转X轴20°"],"ans":"B","tip":"G51.1 X-20以X=-20的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L12 P3 R5.0表示？","opt":["A.修改3号刀长补偿","B.调用子程序3000","C.设置3号刀半径补偿为5.0","D.开启循环"],"ans":"C","tip":"G10 L12 P3设置3号刀具半径补偿值（R5.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H05 Z200.0中，若H05=4.0，实际位置是？","opt":["A.Z200.0","B.Z204.0","C.Z196.0","D.Z4.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=200.0+4.0=204.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若再次使用G43，需要？","opt":["A.重新指定H代码","B.无需操作","C.重启系统","D.更换刀具"],"ans":"A","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H01）。","cate":"程序代码"}, {"q":"G41 D04中，D04的数值类型是？","opt":["A.角度值","B.转速值","C.长度值","D.半径值"],"ans":"D","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X300 Y250 F500表示？","opt":["A.暂停500秒","B.直线插补到(300,250)，进给500mm/min","C.增量移动300","D.快速定位到(300,250)"],"ans":"B","tip":"G90绝对坐标下，G01以500mm/min进给率直线移动到(300,250)。","cate":"程序代码"}, {"q":"G91 G01 X-40 Y-30 F150表示？","opt":["A.移动到(-40,-30)","B.主轴转速30","C.X负移40，Y负移30","D.暂停40秒"],"ans":"C","tip":"G91增量模式下，G01以150mm/min进给率向X负方向移动40，Y负方向移动30。","cate":"程序代码"}, {"q":"M30执行后，冷却液状态是？","opt":["A.自动关闭","B.随机状态","C.保持开启","D.切换为雾状"],"ans":"A","tip":"M30结束程序时会自动关闭切削液，确保设备安全。","cate":"程序代码"}, {"q":"M01与M00在面板开关OFF时的区别是？","opt":["A.两者都暂停","B.M00仍暂停，M01不暂停","C.随机结果","D.两者都不暂停"],"ans":"B","tip":"M00无条件暂停，M01仅在开关ON时暂停，开关OFF时不执行暂停。","cate":"程序代码"}, {"q":"G04 P500表示暂停？","opt":["A.500转","B.500秒","C.0.5分钟","D.0.5秒"],"ans":"D","tip":"G04 P_单位为毫秒，P500即暂停500毫秒（0.5秒）。","cate":"程序代码"}, {"q":"G17 G02 X100 Y100 I30 J0表示？","opt":["A.XY平面顺时针圆弧，圆心X+30","B.XZ平面逆时针圆弧","C.YZ平面直线","D.三维螺旋"],"ans":"A","tip":"G17选XY平面，G02顺时针圆弧，I30 J0表示圆心在X方向正偏移30。","cate":"程序代码"}, {"q":"G41 G01 X150 Y100 D03中，D03的作用是？","opt":["A.指定刀具号","B.选择主轴转速","C.调用3号半径补偿","D.设定进给速度"],"ans":"C","tip":"D03指定使用3号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X200 Z300设定后，若刀具实际位置是X50 Z50，则工件原点在？","opt":["A.机床坐标(X200,Z300)","B.机床坐标(X50,Z50)","C.机床坐标(X150,Z250)","D.随机位置"],"ans":"A","tip":"G92将当前点（X50,Z50）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X200,Z300)。","cate":"程序代码"}, {"q":"G96 S250在直径30mm处的转速约为？","opt":["A.1327 r/min","B.2654 r/min","C.250 r/min","D.663 r/min"],"ans":"B","tip":"n=(1000×250)/(3.14×30)≈2654 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S1500与G96 S1500在直径80mm处的转速分别是？","opt":["A.无法确定","B.1500 r/min 和 1500 r/min","C.1500 r/min 和 597 r/min","D.597 r/min 和 1500 r/min"],"ans":"C","tip":"G97固定1500r/min；G96下n=(1000×1500)/(3.14×80)≈597 r/min。","cate":"程序代码"}, {"q":"M06 T10 M03 S1200的正确执行流程是？","opt":["A.选10号刀→换刀→主轴正转1200r/min","B.换刀→选10号刀→主轴正转","C.无效指令","D.主轴正转→选10号刀→换刀"],"ans":"A","tip":"T10选择刀具，M06执行换刀，M03 S1200启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H06 Z-80.0中，若H06=3.0，实际Z深度是？","opt":["A.0","B.-80.0","C.-83.0","D.-77.0"],"ans":"D","tip":"G43正补偿：实际深度=编程值+补偿值=-80.0+3.0=-77.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G03，系统会？","opt":["A.执行快速移动","B.调用子程序","C.报警（无循环）","D.正常执行圆弧插补"],"ans":"C","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴正转攻入后必须？","opt":["A.快速退刀","B.停止主轴","C.正转退出","D.反转退出"],"ans":"D","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向后让刀方向是？","opt":["A.平行于主轴轴线","B.沿圆弧切线","C.垂直于进给方向","D.随机方向"],"ans":"C","tip":"主轴定向后刀具向垂直进给方向让刀，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 S3500限制的是？","opt":["A.最高主轴转速3500r/min","B.最大切削深度3500mm","C.最快进给速度3500mm/min","D.最大刀具半径3500mm"],"ans":"A","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S300在直径15mm处的转速约为？","opt":["A.3183 r/min","B.1591 r/min","C.6366 r/min","D.300 r/min"],"ans":"C","tip":"n=(1000×300)/(3.14×15)≈6366 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，适合加工？","opt":["A.高温合金等难加工材料","B.木材","C.铝合金","D.塑料"],"ans":"A","tip":"混合冷却（雾状+液态）可增强散热，适合钛合金、镍基合金等难加工材料。","cate":"程序代码"}, {"q":"G28 X100 Z200表示？","opt":["A.取消补偿","B.移动到(100,200)","C.先移动到(100,200)再返回参考点","D.开启镜像"],"ans":"C","tip":"G28使刀具先快速移动到X100 Z200（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P4000 D60表示？","opt":["A.#4=60","B.主轴转速60","C.进给速度60","D.刀具号60"],"ans":"A","tip":"G65调用宏程序时，D对应#4变量，D60即#4=60。","cate":"程序代码"}, {"q":"G68 X0 Y0 R60表示？","opt":["A.平移60mm","B.绕原点旋转60°","C.缩放60%","D.镜像60°"],"ans":"B","tip":"G68以(X0,Y0)为旋转中心，R60设定旋转角度60度。","cate":"程序代码"}, {"q":"G51.1 Y-30表示？","opt":["A.旋转Y轴30°","B.缩放Y轴30%","C.平移Y轴30mm","D.以Y=-30为对称轴镜像"],"ans":"D","tip":"G51.1 Y-30以Y=-30的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L10 P4 R6.0表示？","opt":["A.设置4号刀半径补偿为6.0","B.调用子程序4000","C.开启循环","D.修改4号刀长补偿"],"ans":"A","tip":"G10 L10 P4设置4号刀具半径补偿值（R6.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H06 Z300.0中，若H06=5.0，实际位置是？","opt":["A.Z295.0","B.Z5.0","C.Z300.0","D.Z305.0"],"ans":"D","tip":"G44负补偿：实际位置=编程值+补偿值=300.0+5.0=305.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G44，需要？","opt":["A.无需操作","B.重新指定H代码","C.重启系统","D.更换刀具"],"ans":"B","tip":"G49取消补偿后，再次启用G44需重新指定H代码（如G44 H02）。","cate":"程序代码"}, {"q":"G41 D05中，D05的数值来源是？","opt":["A.刀具半径补偿表","B.主轴参数","C.进给参数","D.刀具长度表"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，D05对应表中第5号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X400 Y350 F600表示？","opt":["A.快速定位到(400,350)","B.直线插补到(400,350)，进给600mm/min","C.暂停600秒","D.增量移动400"],"ans":"B","tip":"G90绝对坐标下，G01以600mm/min进给率直线移动到(400,350)。","cate":"程序代码"}, {"q":"G91 G00 X-50 Y-40表示？","opt":["A.暂停50秒","B.移动到(-50,-40)","C.X负移50，Y负移40","D.主轴转速40"],"ans":"C","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动50，Y负方向移动40。","cate":"程序代码"}, {"q":"M30执行后，主轴状态是？","opt":["A.保持转动","B.自动停止","C.反转","D.随机状态"],"ans":"B","tip":"M30结束程序时会自动停止主轴，确保设备安全。","cate":"程序代码"}, {"q":"M01生效时，程序暂停在哪个位置？","opt":["A.随机位置","B.程序开头","C.M01所在程序段","D.程序末尾"],"ans":"C","tip":"M01暂停在包含该指令的程序段，按循环启动后继续执行。","cate":"程序代码"}, {"q":"G04 X2表示暂停？","opt":["A.2转","B.2秒","C.2分钟","D.2毫秒"],"ans":"B","tip":"G04 X_单位为秒，X2即暂停2秒，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"G17 G03 X120 Y120 I-40 J0表示？","opt":["A.XZ平面顺时针圆弧","B.YZ平面直线","C.XY平面逆时针圆弧，圆心X-40","D.三维螺旋"],"ans":"C","tip":"G17选XY平面，G03逆时针圆弧，I-40 J0表示圆心在X方向负偏移40。","cate":"程序代码"}, {"q":"G41 G01 X200 Y150 D04中，D04的作用是？","opt":["A.调用4号半径补偿","B.指定刀具号","C.设定进给速度","D.选择主轴转速"],"ans":"A","tip":"D04指定使用4号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X300 Z400设定后，若刀具实际位置是X100 Z100，则工件原点在？","opt":["A.机床坐标(X100,Z100)","B.机床坐标(X200,Z300)","C.随机位置","D.机床坐标(X300,Z400)"],"ans":"D","tip":"G92将当前点（X100,Z100）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X300,Z400)。","cate":"程序代码"}, {"q":"G96 S350在直径25mm处的转速约为？","opt":["A.1114 r/min","B.350 r/min","C.4456 r/min","D.2228 r/min"],"ans":"C","tip":"n=(1000×350)/(3.14×25)≈4456 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S2000与G96 S2000在直径60mm处的转速分别是？","opt":["A.1061 r/min 和 2000 r/min","B.2000 r/min 和 2000 r/min","C.无法确定","D.2000 r/min 和 1061 r/min"],"ans":"D","tip":"G97固定2000r/min；G96下n=(1000×2000)/(3.14×60)≈1061 r/min。","cate":"程序代码"}, {"q":"M06 T15 M04 S1500的正确执行流程是？","opt":["A.主轴反转→选15号刀→换刀","B.选15号刀→换刀→主轴反转1500r/min","C.无效指令","D.换刀→选15号刀→主轴反转"],"ans":"B","tip":"T15选择刀具，M06执行换刀，M04 S1500启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H08 Z-100.0中，若H08=4.0，实际Z深度是？","opt":["A.-96.0","B.-100.0","C.-104.0","D.0"],"ans":"A","tip":"G43正补偿：实际深度=编程值+补偿值=-100.0+4.0=-96.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G01，系统会？","opt":["A.报警","B.正常执行直线插补","C.调用子程序","D.执行快速移动"],"ans":"B","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须与什么匹配？","opt":["A.螺距","B.主轴转速","C.刀具直径","D.切削深度"],"ans":"A","tip":"攻丝时F值必须等于螺纹螺距，否则会导致乱扣或螺纹不合格。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过小会导致？","opt":["A.主轴过载","B.进给过快","C.刀具断裂","D.让刀不足划伤孔壁"],"ans":"D","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S4000限制的是？","opt":["A.最高主轴转速4000r/min","B.最快进给速度4000mm/min","C.最大切削深度4000mm","D.最大刀具半径4000mm"],"ans":"A","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S400在直径12mm处的转速约为？","opt":["A.2652 r/min","B.5305 r/min","C.10610 r/min","D.400 r/min"],"ans":"C","tip":"n=(1000×400)/(3.14×12)≈10610 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却液压力？","opt":["A.减小","B.不变","C.随机变化","D.增大"],"ans":"D","tip":"混合冷却模式下，雾状与液态同时喷射，整体冷却压力和流量增大。","cate":"程序代码"}, {"q":"G28 X200 Z300表示？","opt":["A.开启镜像","B.移动到(200,300)","C.先移动到(200,300)再返回参考点","D.取消补偿"],"ans":"C","tip":"G28使刀具先快速移动到X200 Z300（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P5000 E70表示？","opt":["A.主轴转速70","B.#8=70","C.进给速度70","D.刀具号70"],"ans":"B","tip":"G65调用宏程序时，E对应#8变量，E70即#8=70。","cate":"程序代码"}, {"q":"G68 X100 Y100 R-30表示？","opt":["A.缩放30%","B.镜像30°","C.绕(100,100)旋转-30°","D.平移(-30,-30)"],"ans":"C","tip":"G68以(X100,Y100)为旋转中心，R-30设定顺时针旋转30度。","cate":"程序代码"}, {"q":"G51.1 X30表示？","opt":["A.缩放X轴30%","B.旋转X轴30°","C.平移X轴30mm","D.以X=30为对称轴镜像"],"ans":"D","tip":"G51.1 X30以X=30的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L13 P5 R7.0表示？","opt":["A.设置5号刀半径补偿为7.0","B.修改5号刀长补偿","C.开启循环","D.调用子程序5000"],"ans":"A","tip":"G10 L13 P5设置5号刀具半径补偿值（R7.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H07 Z400.0中，若H07=6.0，实际位置是？","opt":["A.Z6.0","B.Z406.0","C.Z400.0","D.Z394.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=400.0+6.0=406.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G43，需要？","opt":["A.无需操作","B.重启系统","C.重新指定H代码","D.更换刀具"],"ans":"C","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H03）。","cate":"程序代码"}, {"q":"G41 D06中，D06的数值类型是？","opt":["A.角度值","B.半径值","C.转速值","D.长度值"],"ans":"B","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X500 Y450 F700表示？","opt":["A.暂停700秒","B.增量移动500","C.直线插补到(500,450)，进给700mm/min","D.快速定位到(500,450)"],"ans":"C","tip":"G90绝对坐标下，G01以700mm/min进给率直线移动到(500,450)。","cate":"程序代码"}, {"q":"G91 G01 X-60 Y-50 F200表示？","opt":["A.X负移60，Y负移50","B.移动到(-60,-50)","C.暂停60秒","D.主轴转速50"],"ans":"A","tip":"G91增量模式下，G01以200mm/min进给率向X负方向移动60，Y负方向移动50。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.程序末尾","B.随机位置","C.下一程序段","D.程序开头"],"ans":"D","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效时，若面板开关OFF，程序会？","opt":["A.跳过M01继续执行","B.报警","C.结束程序","D.暂停在M01处"],"ans":"A","tip":"M01为选择性暂停，开关OFF时自动跳过该指令，不影响加工流程。","cate":"程序代码"}, {"q":"G04 P2000表示暂停？","opt":["A.2分钟","B.2000转","C.2000秒","D.2秒"],"ans":"D","tip":"G04 P_单位为毫秒，P2000即暂停2000毫秒（2秒）。","cate":"程序代码"}, {"q":"G17 G02 X150 Y150 I50 J0表示？","opt":["A.XY平面顺时针圆弧，圆心X+50","B.XZ平面逆时针圆弧","C.三维螺旋","D.YZ平面直线"],"ans":"A","tip":"G17选XY平面，G02顺时针圆弧，I50 J0表示圆心在X方向正偏移50。","cate":"程序代码"}, {"q":"G41 G01 X250 Y200 D05中，D05的作用是？","opt":["A.指定刀具号","B.选择主轴转速","C.设定进给速度","D.调用5号半径补偿"],"ans":"D","tip":"D05指定使用5号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X400 Z500设定后，若刀具实际位置是X150 Z150，则工件原点在？","opt":["A.机床坐标(X150,Z150)","B.随机位置","C.机床坐标(X400,Z500)","D.机床坐标(X250,Z350)"],"ans":"C","tip":"G92将当前点（X150,Z150）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X400,Z500)。","cate":"程序代码"}, {"q":"G96 S450在直径20mm处的转速约为？","opt":["A.450 r/min","B.7162 r/min","C.3581 r/min","D.1790 r/min"],"ans":"B","tip":"n=(1000×450)/(3.14×20)≈7162 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S2500与G96 S2500在直径50mm处的转速分别是？","opt":["A.无法确定","B.1592 r/min 和 2500 r/min","C.2500 r/min 和 1592 r/min","D.2500 r/min 和 2500 r/min"],"ans":"C","tip":"G97固定2500r/min；G96下n=(1000×2500)/(3.14×50)≈1592 r/min。","cate":"程序代码"}, {"q":"M06 T20 M03 S2000的正确执行流程是？","opt":["A.无效指令","B.选20号刀→换刀→主轴正转2000r/min","C.主轴正转→选20号刀→换刀","D.换刀→选20号刀→主轴正转"],"ans":"B","tip":"T20选择刀具，M06执行换刀，M03 S2000启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H10 Z-120.0中，若H10=5.0，实际Z深度是？","opt":["A.-115.0","B.-120.0","C.-125.0","D.0"],"ans":"A","tip":"G43正补偿：实际深度=编程值+补偿值=-120.0+5.0=-115.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G03，系统会？","opt":["A.执行快速移动","B.报警（无循环）","C.调用子程序","D.正常执行圆弧插补"],"ans":"B","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴反转退出是为了？","opt":["A.匹配螺纹旋向","B.提高转速","C.减少热量","D.保护刀具"],"ans":"A","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向后让刀方向是？","opt":["A.平行于主轴轴线","B.垂直于进给方向","C.随机方向","D.沿圆弧切线"],"ans":"B","tip":"主轴定向后刀具向垂直进给方向让刀，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 S4500限制的是？","opt":["A.最快进给速度4500mm/min","B.最大刀具半径4500mm","C.最高主轴转速4500r/min","D.最大切削深度4500mm"],"ans":"C","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S500在直径10mm处的转速约为？","opt":["A.15915 r/min","B.500 r/min","C.3978 r/min","D.7957 r/min"],"ans":"A","tip":"n=(1000×500)/(3.14×10)≈15915 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，适合加工？","opt":["A.塑料","B.高温合金等难加工材料","C.铝合金","D.木材"],"ans":"B","tip":"混合冷却（雾状+液态）可增强散热，适合钛合金、镍基合金等难加工材料。","cate":"程序代码"}, {"q":"G28 X300 Z400表示？","opt":["A.取消补偿","B.移动到(300,400)","C.先移动到(300,400)再返回参考点","D.开启镜像"],"ans":"C","tip":"G28使刀具先快速移动到X300 Z400（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P6000 F80表示？","opt":["A.进给速度80","B.#6=80","C.主轴转速80","D.刀具号80"],"ans":"B","tip":"G65调用宏程序时，F对应#6变量，F80即#6=80。","cate":"程序代码"}, {"q":"G68 X200 Y200 R90表示？","opt":["A.平移90mm","B.镜像90°","C.绕(200,200)旋转90°","D.缩放90%"],"ans":"C","tip":"G68以(X200,Y200)为旋转中心，R90设定旋转角度90度。","cate":"程序代码"}, {"q":"G51.1 Y40表示？","opt":["A.平移Y轴40mm","B.以Y=40为对称轴镜像","C.缩放Y轴40%","D.旋转Y轴40°"],"ans":"B","tip":"G51.1 Y40以Y=40的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L14 P6 R8.0表示？","opt":["A.调用子程序6000","B.修改6号刀长补偿","C.设置6号刀半径补偿为8.0","D.开启循环"],"ans":"C","tip":"G10 L14 P6设置6号刀具半径补偿值（R8.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H08 Z500.0中，若H08=7.0，实际位置是？","opt":["A.Z7.0","B.Z507.0","C.Z493.0","D.Z500.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=500.0+7.0=507.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G44，需要？","opt":["A.更换刀具","B.重启系统","C.重新指定H代码","D.无需操作"],"ans":"C","tip":"G49取消补偿后，再次启用G44需重新指定H代码（如G44 H04）。","cate":"程序代码"}, {"q":"G41 D07中，D07的数值来源是？","opt":["A.刀具半径补偿表","B.刀具长度表","C.进给参数","D.主轴参数"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，D07对应表中第7号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X600 Y550 F800表示？","opt":["A.增量移动600","B.快速定位到(600,550)","C.暂停800秒","D.直线插补到(600,550)，进给800mm/min"],"ans":"D","tip":"G90绝对坐标下，G01以800mm/min进给率直线移动到(600,550)。","cate":"程序代码"}, {"q":"G91 G00 X-70 Y-60表示？","opt":["A.移动到(-70,-60)","B.暂停70秒","C.X负移70，Y负移60","D.主轴转速60"],"ans":"C","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动70，Y负方向移动60。","cate":"程序代码"}, {"q":"M30执行后，冷却液状态是？","opt":["A.切换为雾状","B.随机状态","C.保持开启","D.自动关闭"],"ans":"D","tip":"M30结束程序时会自动关闭切削液，确保设备安全。","cate":"程序代码"}, {"q":"M01与M00在面板开关ON时的区别是？","opt":["A.随机结果","B.两者都有条件暂停","C.M00无条件暂停，M01有条件暂停","D.两者都无条件暂停"],"ans":"C","tip":"M00始终暂停，M01仅在开关ON时暂停，用于调试或抽检。","cate":"程序代码"}, {"q":"G04 X5表示暂停？","opt":["A.5分钟","B.5秒","C.5转","D.5毫秒"],"ans":"B","tip":"G04 X_单位为秒，X5即暂停5秒，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"G17 G03 X180 Y180 I-60 J0表示？","opt":["A.YZ平面直线","B.三维螺旋","C.XY平面逆时针圆弧，圆心X-60","D.XZ平面顺时针圆弧"],"ans":"C","tip":"G17选XY平面，G03逆时针圆弧，I-60 J0表示圆心在X方向负偏移60。","cate":"程序代码"}, {"q":"G41 G01 X300 Y250 D06中，D06的作用是？","opt":["A.调用6号半径补偿","B.指定刀具号","C.设定进给速度","D.选择主轴转速"],"ans":"A","tip":"D06指定使用6号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X500 Z600设定后，若刀具实际位置是X200 Z200，则工件原点在？","opt":["A.随机位置","B.机床坐标(X300,Z400)","C.机床坐标(X200,Z200)","D.机床坐标(X500,Z600)"],"ans":"D","tip":"G92将当前点（X200,Z200）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X500,Z600)。","cate":"程序代码"}, {"q":"G96 S550在直径15mm处的转速约为？","opt":["A.11676 r/min","B.550 r/min","C.5838 r/min","D.2919 r/min"],"ans":"A","tip":"n=(1000×550)/(3.14×15)≈11676 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S3000与G96 S3000在直径40mm处的转速分别是？","opt":["A.3000 r/min 和 3000 r/min","B.2388 r/min 和 3000 r/min","C.3000 r/min 和 2388 r/min","D.无法确定"],"ans":"C","tip":"G97固定3000r/min；G96下n=(1000×3000)/(3.14×40)≈2388 r/min。","cate":"程序代码"}, {"q":"M06 T25 M04 S2500的正确执行流程是？","opt":["A.主轴反转→选25号刀→换刀","B.无效指令","C.换刀→选25号刀→主轴反转","D.选25号刀→换刀→主轴反转2500r/min"],"ans":"D","tip":"T25选择刀具，M06执行换刀，M04 S2500启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H12 Z-150.0中，若H12=6.0，实际Z深度是？","opt":["A.-156.0","B.-150.0","C.-144.0","D.0"],"ans":"C","tip":"G43正补偿：实际深度=编程值+补偿值=-150.0+6.0=-144.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G01，系统会？","opt":["A.报警","B.调用子程序","C.执行快速移动","D.正常执行直线插补"],"ans":"D","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须与什么匹配？","opt":["A.刀具直径","B.主轴转速","C.螺距","D.切削深度"],"ans":"C","tip":"攻丝时F值必须等于螺纹螺距，否则会导致乱扣或螺纹不合格。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过小会导致？","opt":["A.让刀不足划伤孔壁","B.主轴过载","C.刀具断裂","D.进给过快"],"ans":"A","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S5000限制的是？","opt":["A.最大切削深度5000mm","B.最快进给速度5000mm/min","C.最高主轴转速5000r/min","D.最大刀具半径5000mm"],"ans":"C","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S600在直径8mm处的转速约为？","opt":["A.600 r/min","B.5968 r/min","C.11936 r/min","D.23873 r/min"],"ans":"D","tip":"n=(1000×600)/(3.14×8)≈23873 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却液流量？","opt":["A.增大","B.不变","C.随机变化","D.减小"],"ans":"A","tip":"混合冷却模式下，雾状与液态同时喷射，整体冷却流量和压力增大。","cate":"程序代码"}, {"q":"G28 X400 Z500表示？","opt":["A.取消补偿","B.先移动到(400,500)再返回参考点","C.开启镜像","D.移动到(400,500)"],"ans":"B","tip":"G28使刀具先快速移动到X400 Z500（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P7000 G90表示？","opt":["A.#7=90","B.主轴转速90","C.刀具号90","D.进给速度90"],"ans":"A","tip":"G65调用宏程序时，G对应#7变量，G90即#7=90。","cate":"程序代码"}, {"q":"G68 X300 Y300 R-60表示？","opt":["A.缩放60%","B.平移(-60,-60)","C.镜像60°","D.绕(300,300)旋转-60°"],"ans":"D","tip":"G68以(X300,Y300)为旋转中心，R-60设定顺时针旋转60度。","cate":"程序代码"}, {"q":"G51.1 X50表示？","opt":["A.旋转X轴50°","B.平移X轴50mm","C.以X=50为对称轴镜像","D.缩放X轴50%"],"ans":"C","tip":"G51.1 X50以X=50的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L15 P7 R9.0表示？","opt":["A.设置7号刀半径补偿为9.0","B.调用子程序7000","C.修改7号刀长补偿","D.开启循环"],"ans":"A","tip":"G10 L15 P7设置7号刀具半径补偿值（R9.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H09 Z600.0中，若H09=8.0，实际位置是？","opt":["A.Z600.0","B.Z8.0","C.Z608.0","D.Z592.0"],"ans":"C","tip":"G44负补偿：实际位置=编程值+补偿值=600.0+8.0=608.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G43，需要？","opt":["A.重新指定H代码","B.重启系统","C.无需操作","D.更换刀具"],"ans":"A","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H05）。","cate":"程序代码"}, {"q":"G41 D08中，D08的数值类型是？","opt":["A.长度值","B.角度值","C.转速值","D.半径值"],"ans":"D","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X700 Y650 F900表示？","opt":["A.直线插补到(700,650)，进给900mm/min","B.快速定位到(700,650)","C.暂停900秒","D.增量移动700"],"ans":"A","tip":"G90绝对坐标下，G01以900mm/min进给率直线移动到(700,650)。","cate":"程序代码"}, {"q":"G91 G01 X-80 Y-70 F250表示？","opt":["A.暂停80秒","B.主轴转速70","C.移动到(-80,-70)","D.X负移80，Y负移70"],"ans":"D","tip":"G91增量模式下，G01以250mm/min进给率向X负方向移动80，Y负方向移动70。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.程序开头","B.随机位置","C.程序末尾","D.下一程序段"],"ans":"A","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效时，若面板开关OFF，程序会？","opt":["A.暂停在M01处","B.报警","C.跳过M01继续执行","D.结束程序"],"ans":"C","tip":"M01为选择性暂停，开关OFF时自动跳过该指令，不影响加工流程。","cate":"程序代码"}, {"q":"G04 P3000表示暂停？","opt":["A.3000转","B.3000秒","C.3分钟","D.3秒"],"ans":"D","tip":"G04 P_单位为毫秒，P3000即暂停3000毫秒（3秒）。","cate":"程序代码"}, {"q":"G17 G02 X200 Y200 I70 J0表示？","opt":["A.三维螺旋","B.XY平面顺时针圆弧，圆心X+70","C.YZ平面直线","D.XZ平面逆时针圆弧"],"ans":"B","tip":"G17选XY平面，G02顺时针圆弧，I70 J0表示圆心在X方向正偏移70。","cate":"程序代码"}, {"q":"G41 G01 X350 Y300 D07中，D07的作用是？","opt":["A.调用7号半径补偿","B.指定刀具号","C.设定进给速度","D.选择主轴转速"],"ans":"A","tip":"D07指定使用7号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X600 Z700设定后，若刀具实际位置是X250 Z250，则工件原点在？","opt":["A.机床坐标(X350,Z450)","B.随机位置","C.机床坐标(X250,Z250)","D.机床坐标(X600,Z700)"],"ans":"D","tip":"G92将当前点（X250,Z250）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X600,Z700)。","cate":"程序代码"}, {"q":"G96 S650在直径12mm处的转速约为？","opt":["A.17235 r/min","B.650 r/min","C.4308 r/min","D.8617 r/min"],"ans":"A","tip":"n=(1000×650)/(3.14×12)≈17235 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S3500与G96 S3500在直径30mm处的转速分别是？","opt":["A.3717 r/min 和 3500 r/min","B.3500 r/min 和 3717 r/min","C.3500 r/min 和 3500 r/min","D.无法确定"],"ans":"B","tip":"G97固定3500r/min；G96下n=(1000×3500)/(3.14×30)≈3717 r/min。","cate":"程序代码"}, {"q":"M06 T30 M03 S3000的正确执行流程是？","opt":["A.选30号刀→换刀→主轴正转3000r/min","B.换刀→选30号刀→主轴正转","C.主轴正转→选30号刀→换刀","D.无效指令"],"ans":"A","tip":"T30选择刀具，M06执行换刀，M03 S3000启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H14 Z-180.0中，若H14=7.0，实际Z深度是？","opt":["A.0","B.-173.0","C.-187.0","D.-180.0"],"ans":"B","tip":"G43正补偿：实际深度=编程值+补偿值=-180.0+7.0=-173.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G03，系统会？","opt":["A.调用子程序","B.执行快速移动","C.正常执行圆弧插补","D.报警（无循环）"],"ans":"D","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴反转退出是为了？","opt":["A.提高转速","B.匹配螺纹旋向","C.减少热量","D.保护刀具"],"ans":"B","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向后让刀方向是？","opt":["A.垂直于进给方向","B.平行于主轴轴线","C.随机方向","D.沿圆弧切线"],"ans":"A","tip":"主轴定向后刀具向垂直进给方向让刀，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 S5500限制的是？","opt":["A.最大刀具半径5500mm","B.最高主轴转速5500r/min","C.最大切削深度5500mm","D.最快进给速度5500mm/min"],"ans":"B","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S700在直径6mm处的转速约为？","opt":["A.18583 r/min","B.700 r/min","C.37167 r/min","D.9289 r/min"],"ans":"C","tip":"n=(1000×700)/(3.14×6)≈37167 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，适合加工？","opt":["A.铝合金","B.木材","C.塑料","D.高温合金等难加工材料"],"ans":"D","tip":"混合冷却（雾状+液态）可增强散热，适合钛合金、镍基合金等难加工材料。","cate":"程序代码"}, {"q":"G28 X500 Z600表示？","opt":["A.开启镜像","B.移动到(500,600)","C.先移动到(500,600)再返回参考点","D.取消补偿"],"ans":"C","tip":"G28使刀具先快速移动到X500 Z600（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P8000 H100表示？","opt":["A.#11=100","B.刀具号100","C.主轴转速100","D.进给速度100"],"ans":"A","tip":"G65调用宏程序时，H对应#11变量，H100即#11=100。","cate":"程序代码"}, {"q":"G68 X400 Y400 R120表示？","opt":["A.缩放120%","B.绕(400,400)旋转120°","C.平移120mm","D.镜像120°"],"ans":"B","tip":"G68以(X400,Y400)为旋转中心，R120设定旋转角度120度。","cate":"程序代码"}, {"q":"G51.1 Y60表示？","opt":["A.以Y=60为对称轴镜像","B.旋转Y轴60°","C.平移Y轴60mm","D.缩放Y轴60%"],"ans":"A","tip":"G51.1 Y60以Y=60的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L16 P8 R10.0表示？","opt":["A.开启循环","B.修改8号刀长补偿","C.设置8号刀半径补偿为10.0","D.调用子程序8000"],"ans":"C","tip":"G10 L16 P8设置8号刀具半径补偿值（R10.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H10 Z700.0中，若H10=9.0，实际位置是？","opt":["A.Z9.0","B.Z709.0","C.Z691.0","D.Z700.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=700.0+9.0=709.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G44，需要？","opt":["A.重启系统","B.更换刀具","C.重新指定H代码","D.无需操作"],"ans":"C","tip":"G49取消补偿后，再次启用G44需重新指定H代码（如G44 H06）。","cate":"程序代码"}, {"q":"G41 D09中，D09的数值来源是？","opt":["A.主轴参数","B.刀具半径补偿表","C.刀具长度表","D.进给参数"],"ans":"B","tip":"D代码调用刀具半径补偿寄存器，D09对应表中第9号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X800 Y750 F1000表示？","opt":["A.快速定位到(800,750)","B.暂停1000秒","C.增量移动800","D.直线插补到(800,750)，进给1000mm/min"],"ans":"D","tip":"G90绝对坐标下，G01以1000mm/min进给率直线移动到(800,750)。","cate":"程序代码"}, {"q":"G91 G00 X-90 Y-80表示？","opt":["A.暂停90秒","B.移动到(-90,-80)","C.X负移90，Y负移80","D.主轴转速80"],"ans":"C","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动90，Y负方向移动80。","cate":"程序代码"}, {"q":"M30执行后，冷却液状态是？","opt":["A.切换为雾状","B.自动关闭","C.随机状态","D.保持开启"],"ans":"B","tip":"M30结束程序时会自动关闭切削液，确保设备安全。","cate":"程序代码"}, {"q":"M01与M00在面板开关ON时的区别是？","opt":["A.随机结果","B.两者都无条件暂停","C.两者都有条件暂停","D.M00无条件暂停，M01有条件暂停"],"ans":"D","tip":"M00始终暂停，M01仅在开关ON时暂停，用于调试或抽检。","cate":"程序代码"}, {"q":"G04 X10表示暂停？","opt":["A.10毫秒","B.10转","C.10秒","D.10分钟"],"ans":"C","tip":"G04 X_单位为秒，X10即暂停10秒，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"G17 G03 X220 Y220 I-80 J0表示？","opt":["A.XY平面逆时针圆弧，圆心X-80","B.YZ平面直线","C.XZ平面顺时针圆弧","D.三维螺旋"],"ans":"A","tip":"G17选XY平面，G03逆时针圆弧，I-80 J0表示圆心在X方向负偏移80。","cate":"程序代码"}, {"q":"G41 G01 X400 Y350 D08中，D08的作用是？","opt":["A.指定刀具号","B.设定进给速度","C.调用8号半径补偿","D.选择主轴转速"],"ans":"C","tip":"D08指定使用8号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X700 Z800设定后，若刀具实际位置是X300 Z300，则工件原点在？","opt":["A.随机位置","B.机床坐标(X700,Z800)","C.机床坐标(X400,Z500)","D.机床坐标(X300,Z300)"],"ans":"B","tip":"G92将当前点（X300,Z300）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X700,Z800)。","cate":"程序代码"}, {"q":"G96 S750在直径10mm处的转速约为？","opt":["A.23873 r/min","B.11936 r/min","C.5968 r/min","D.750 r/min"],"ans":"A","tip":"n=(1000×750)/(3.14×10)≈23873 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S4000与G96 S4000在直径20mm处的转速分别是？","opt":["A.无法确定","B.4000 r/min 和 6366 r/min","C.4000 r/min 和 4000 r/min","D.6366 r/min 和 4000 r/min"],"ans":"B","tip":"G97固定4000r/min；G96下n=(1000×4000)/(3.14×20)≈6366 r/min。","cate":"程序代码"}, {"q":"M06 T35 M04 S3500的正确执行流程是？","opt":["A.换刀→选35号刀→主轴反转","B.主轴反转→选35号刀→换刀","C.无效指令","D.选35号刀→换刀→主轴反转3500r/min"],"ans":"D","tip":"T35选择刀具，M06执行换刀，M04 S3500启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H16 Z-200.0中，若H16=8.0，实际Z深度是？","opt":["A.-192.0","B.-208.0","C.-200.0","D.0"],"ans":"A","tip":"G43正补偿：实际深度=编程值+补偿值=-200.0+8.0=-192.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G01，系统会？","opt":["A.报警","B.执行快速移动","C.调用子程序","D.正常执行直线插补"],"ans":"D","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须与什么匹配？","opt":["A.螺距","B.切削深度","C.刀具直径","D.主轴转速"],"ans":"A","tip":"攻丝时F值必须等于螺纹螺距，否则会导致乱扣或螺纹不合格。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过小会导致？","opt":["A.进给过快","B.刀具断裂","C.让刀不足划伤孔壁","D.主轴过载"],"ans":"C","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S6000限制的是？","opt":["A.最大切削深度6000mm","B.最高主轴转速6000r/min","C.最大刀具半径6000mm","D.最快进给速度6000mm/min"],"ans":"B","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S800在直径5mm处的转速约为？","opt":["A.800 r/min","B.25465 r/min","C.50930 r/min","D.12732 r/min"],"ans":"C","tip":"n=(1000×800)/(3.14×5)≈50930 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却液压力？","opt":["A.不变","B.增大","C.减小","D.随机变化"],"ans":"B","tip":"混合冷却模式下，雾状与液态同时喷射，整体冷却压力和流量增大。","cate":"程序代码"}, {"q":"G28 X600 Z800表示？","opt":["A.开启镜像","B.移动到(600,800)","C.取消补偿","D.先移动到(600,800)再返回参考点"],"ans":"D","tip":"G28使刀具先快速移动到X600 Z800（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P9000 K120表示？","opt":["A.主轴转速120","B.#6=120","C.进给速度120","D.刀具号120"],"ans":"B","tip":"G65调用宏程序时，K对应#6变量，K120即#6=120。","cate":"程序代码"}, {"q":"G68 X500 Y500 R150表示？","opt":["A.绕(500,500)旋转150°","B.平移150mm","C.缩放150%","D.镜像150°"],"ans":"A","tip":"G68以(X500,Y500)为旋转中心，R150设定旋转角度150度。","cate":"程序代码"}, {"q":"G51.1 X70表示？","opt":["A.缩放X轴70%","B.平移X轴70mm","C.旋转X轴70°","D.以X=70为对称轴镜像"],"ans":"D","tip":"G51.1 X70以X=70的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L17 P9 R11.0表示？","opt":["A.修改9号刀长补偿","B.设置9号刀半径补偿为11.0","C.开启循环","D.调用子程序9000"],"ans":"B","tip":"G10 L17 P9设置9号刀具半径补偿值（R11.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H12 Z800.0中，若H12=10.0，实际位置是？","opt":["A.Z10.0","B.Z790.0","C.Z810.0","D.Z800.0"],"ans":"C","tip":"G44负补偿：实际位置=编程值+补偿值=800.0+10.0=810.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G43，需要？","opt":["A.无需操作","B.重新指定H代码","C.重启系统","D.更换刀具"],"ans":"B","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H07）。","cate":"程序代码"}, {"q":"G41 D10中，D10的数值类型是？","opt":["A.半径值","B.角度值","C.长度值","D.转速值"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X900 Y850 F1100表示？","opt":["A.暂停1100秒","B.直线插补到(900,850)，进给1100mm/min","C.快速定位到(900,850)","D.增量移动900"],"ans":"B","tip":"G90绝对坐标下，G01以1100mm/min进给率直线移动到(900,850)。","cate":"程序代码"}, {"q":"G91 G01 X-100 Y-90 F300表示？","opt":["A.X负移100，Y负移90","B.主轴转速90","C.暂停100秒","D.移动到(-100,-90)"],"ans":"A","tip":"G91增量模式下，G01以300mm/min进给率向X负方向移动100，Y负方向移动90。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.下一程序段","B.随机位置","C.程序末尾","D.程序开头"],"ans":"D","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效时，若面板开关OFF，程序会？","opt":["A.跳过M01继续执行","B.报警","C.暂停在M01处","D.结束程序"],"ans":"A","tip":"M01为选择性暂停，开关OFF时自动跳过该指令，不影响加工流程。","cate":"程序代码"}, {"q":"G04 P4000表示暂停？","opt":["A.4000秒","B.4分钟","C.4000转","D.4秒"],"ans":"D","tip":"G04 P_单位为毫秒，P4000即暂停4000毫秒（4秒）。","cate":"程序代码"}, {"q":"G17 G02 X250 Y250 I90 J0表示？","opt":["A.XY平面顺时针圆弧，圆心X+90","B.YZ平面直线","C.XZ平面逆时针圆弧","D.三维螺旋"],"ans":"A","tip":"G17选XY平面，G02顺时针圆弧，I90 J0表示圆心在X方向正偏移90。","cate":"程序代码"}, {"q":"G41 G01 X450 Y400 D09中，D09的作用是？","opt":["A.选择主轴转速","B.调用9号半径补偿","C.设定进给速度","D.指定刀具号"],"ans":"B","tip":"D09指定使用9号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X800 Z900设定后，若刀具实际位置是X350 Z350，则工件原点在？","opt":["A.随机位置","B.机床坐标(X350,Z350)","C.机床坐标(X800,Z900)","D.机床坐标(X450,Z550)"],"ans":"C","tip":"G92将当前点（X350,Z350）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X800,Z900)。","cate":"程序代码"}, {"q":"G96 S850在直径8mm处的转速约为？","opt":["A.16914 r/min","B.850 r/min","C.8457 r/min","D.33829 r/min"],"ans":"D","tip":"n=(1000×850)/(3.14×8)≈33829 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S4500与G96 S4500在直径15mm处的转速分别是？","opt":["A.4500 r/min 和 95493 r/min","B.95493 r/min 和 4500 r/min","C.无法确定","D.4500 r/min 和 4500 r/min"],"ans":"A","tip":"G97固定4500r/min；G96下n=(1000×4500)/(3.14×15)≈95493 r/min。","cate":"程序代码"}, {"q":"M06 T40 M03 S4000的正确执行流程是？","opt":["A.主轴正转→选40号刀→换刀","B.无效指令","C.换刀→选40号刀→主轴正转","D.选40号刀→换刀→主轴正转4000r/min"],"ans":"D","tip":"T40选择刀具，M06执行换刀，M03 S4000启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H18 Z-220.0中，若H18=9.0，实际Z深度是？","opt":["A.-220.0","B.-211.0","C.0","D.-229.0"],"ans":"B","tip":"G43正补偿：实际深度=编程值+补偿值=-220.0+9.0=-211.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G03，系统会？","opt":["A.正常执行圆弧插补","B.执行快速移动","C.调用子程序","D.报警（无循环）"],"ans":"D","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴反转退出是为了？","opt":["A.提高转速","B.匹配螺纹旋向","C.保护刀具","D.减少热量"],"ans":"B","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向后让刀方向是？","opt":["A.随机方向","B.平行于主轴轴线","C.垂直于进给方向","D.沿圆弧切线"],"ans":"C","tip":"主轴定向后刀具向垂直进给方向让刀，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 S6500限制的是？","opt":["A.最大刀具半径6500mm","B.最大切削深度6500mm","C.最快进给速度6500mm/min","D.最高主轴转速6500r/min"],"ans":"D","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S900在直径4mm处的转速约为？","opt":["A.71620 r/min","B.900 r/min","C.17905 r/min","D.35810 r/min"],"ans":"A","tip":"n=(1000×900)/(3.14×4)≈71620 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，适合加工？","opt":["A.木材","B.高温合金等难加工材料","C.铝合金","D.塑料"],"ans":"B","tip":"混合冷却（雾状+液态）可增强散热，适合钛合金、镍基合金等难加工材料。","cate":"程序代码"}, {"q":"G28 X700 Z900表示？","opt":["A.移动到(700,900)","B.开启镜像","C.取消补偿","D.先移动到(700,900)再返回参考点"],"ans":"D","tip":"G28使刀具先快速移动到X700 Z900（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P10000 L130表示？","opt":["A.刀具号130","B.#12=130","C.主轴转速130","D.进给速度130"],"ans":"B","tip":"G65调用宏程序时，L对应#12变量，L130即#12=130。","cate":"程序代码"}, {"q":"G68 X600 Y600 R180表示？","opt":["A.绕(600,600)旋转180°","B.镜像180°","C.平移180mm","D.缩放180%"],"ans":"A","tip":"G68以(X600,Y600)为旋转中心，R180设定旋转角度180度。","cate":"程序代码"}, {"q":"G51.1 Y80表示？","opt":["A.平移Y轴80mm","B.以Y=80为对称轴镜像","C.旋转Y轴80°","D.缩放Y轴80%"],"ans":"B","tip":"G51.1 Y80以Y=80的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L18 P10 R12.0表示？","opt":["A.调用子程序10000","B.修改10号刀长补偿","C.设置10号刀半径补偿为12.0","D.开启循环"],"ans":"C","tip":"G10 L18 P10设置10号刀具半径补偿值（R12.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H14 Z900.0中，若H14=11.0，实际位置是？","opt":["A.Z900.0","B.Z911.0","C.Z889.0","D.Z11.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=900.0+11.0=911.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G44，需要？","opt":["A.更换刀具","B.重启系统","C.无需操作","D.重新指定H代码"],"ans":"D","tip":"G49取消补偿后，再次启用G44需重新指定H代码（如G44 H08）。","cate":"程序代码"}, {"q":"G41 D11中，D11的数值来源是？","opt":["A.主轴参数","B.刀具半径补偿表","C.进给参数","D.刀具长度表"],"ans":"B","tip":"D代码调用刀具半径补偿寄存器，D11对应表中第11号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X1000 Y950 F1200表示？","opt":["A.直线插补到(1000,950)，进给1200mm/min","B.快速定位到(1000,950)","C.暂停1200秒","D.增量移动1000"],"ans":"A","tip":"G90绝对坐标下，G01以1200mm/min进给率直线移动到(1000,950)。","cate":"程序代码"}, {"q":"G91 G00 X-110 Y-100表示？","opt":["A.暂停110秒","B.X负移110，Y负移100","C.主轴转速100","D.移动到(-110,-100)"],"ans":"B","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动110，Y负方向移动100。","cate":"程序代码"}, {"q":"M30执行后，冷却液状态是？","opt":["A.切换为雾状","B.保持开启","C.自动关闭","D.随机状态"],"ans":"C","tip":"M30结束程序时会自动关闭切削液，确保设备安全。","cate":"程序代码"}, {"q":"M01与M00在面板开关ON时的区别是？","opt":["A.两者都无条件暂停","B.随机结果","C.两者都有条件暂停","D.M00无条件暂停，M01有条件暂停"],"ans":"D","tip":"M00始终暂停，M01仅在开关ON时暂停，用于调试或抽检。","cate":"程序代码"}, {"q":"G04 X15表示暂停？","opt":["A.15分钟","B.15毫秒","C.15秒","D.15转"],"ans":"C","tip":"G04 X_单位为秒，X15即暂停15秒，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"G17 G03 X270 Y270 I-100 J0表示？","opt":["A.YZ平面直线","B.XY平面逆时针圆弧，圆心X-100","C.三维螺旋","D.XZ平面顺时针圆弧"],"ans":"B","tip":"G17选XY平面，G03逆时针圆弧，I-100 J0表示圆心在X方向负偏移100。","cate":"程序代码"}, {"q":"G41 G01 X500 Y450 D10中，D10的作用是？","opt":["A.设定进给速度","B.选择主轴转速","C.调用10号半径补偿","D.指定刀具号"],"ans":"C","tip":"D10指定使用10号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X900 Z1000设定后，若刀具实际位置是X400 Z400，则工件原点在？","opt":["A.机床坐标(X900,Z1000)","B.机床坐标(X400,Z400)","C.机床坐标(X500,Z600)","D.随机位置"],"ans":"A","tip":"G92将当前点（X400,Z400）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X900,Z1000)。","cate":"程序代码"}, {"q":"G96 S950在直径6mm处的转速约为？","opt":["A.25165 r/min","B.50331 r/min","C.12582 r/min","D.950 r/min"],"ans":"B","tip":"n=(1000×950)/(3.14×6)≈50331 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S5000与G96 S5000在直径10mm处的转速分别是？","opt":["A.5000 r/min 和 5000 r/min","B.无法确定","C.5000 r/min 和 159155 r/min","D.159155 r/min 和 5000 r/min"],"ans":"C","tip":"G97固定5000r/min；G96下n=(1000×5000)/(3.14×10)≈159155 r/min。","cate":"程序代码"}, {"q":"M06 T45 M04 S4500的正确执行流程是？","opt":["A.换刀→选45号刀→主轴反转","B.选45号刀→换刀→主轴反转4500r/min","C.主轴反转→选45号刀→换刀","D.无效指令"],"ans":"B","tip":"T45选择刀具，M06执行换刀，M04 S4500启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H20 Z-250.0中，若H20=10.0，实际Z深度是？","opt":["A.-260.0","B.0","C.-250.0","D.-240.0"],"ans":"D","tip":"G43正补偿：实际深度=编程值+补偿值=-250.0+10.0=-240.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G01，系统会？","opt":["A.正常执行直线插补","B.调用子程序","C.报警","D.执行快速移动"],"ans":"A","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须与什么匹配？","opt":["A.刀具直径","B.螺距","C.主轴转速","D.切削深度"],"ans":"B","tip":"攻丝时F值必须等于螺纹螺距，否则会导致乱扣或螺纹不合格。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过小会导致？","opt":["A.主轴过载","B.刀具断裂","C.让刀不足划伤孔壁","D.进给过快"],"ans":"C","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S7000限制的是？","opt":["A.最快进给速度7000mm/min","B.最大刀具半径7000mm","C.最大切削深度7000mm","D.最高主轴转速7000r/min"],"ans":"D","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S1000在直径5mm处的转速约为？","opt":["A.31831 r/min","B.15915 r/min","C.63662 r/min","D.1000 r/min"],"ans":"C","tip":"n=(1000×1000)/(3.14×5)≈63662 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却液流量？","opt":["A.不变","B.增大","C.减小","D.随机变化"],"ans":"B","tip":"混合冷却模式下，雾状与液态同时喷射，整体冷却流量和压力增大。","cate":"程序代码"}, {"q":"G28 X800 Z1000表示？","opt":["A.先移动到(800,1000)再返回参考点","B.取消补偿","C.开启镜像","D.移动到(800,1000)"],"ans":"A","tip":"G28使刀具先快速移动到X800 Z1000（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P11000 M140表示？","opt":["A.刀具号140","B.#13=140","C.进给速度140","D.主轴转速140"],"ans":"B","tip":"G65调用宏程序时，M对应#13变量，M140即#13=140。","cate":"程序代码"}, {"q":"G68 X700 Y700 R210表示？","opt":["A.缩放210%","B.平移210mm","C.绕(700,700)旋转210°","D.镜像210°"],"ans":"C","tip":"G68以(X700,Y700)为旋转中心，R210设定旋转角度210度。","cate":"程序代码"}, {"q":"G51.1 X80表示？","opt":["A.缩放X轴80%","B.以X=80为对称轴镜像","C.平移X轴80mm","D.旋转X轴80°"],"ans":"B","tip":"G51.1 X80以X=80的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L19 P11 R13.0表示？","opt":["A.调用子程序11000","B.开启循环","C.修改11号刀长补偿","D.设置11号刀半径补偿为13.0"],"ans":"D","tip":"G10 L19 P11设置11号刀具半径补偿值（R13.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H16 Z1000.0中，若H16=12.0，实际位置是？","opt":["A.Z988.0","B.Z1012.0","C.Z12.0","D.Z1000.0"],"ans":"B","tip":"G44负补偿：实际位置=编程值+补偿值=1000.0+12.0=1012.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G43，需要？","opt":["A.无需操作","B.更换刀具","C.重新指定H代码","D.重启系统"],"ans":"C","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H09）。","cate":"程序代码"}, {"q":"G41 D12中，D12的数值类型是？","opt":["A.转速值","B.长度值","C.角度值","D.半径值"],"ans":"D","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X1100 Y1050 F1300表示？","opt":["A.增量移动1100","B.直线插补到(1100,1050)，进给1300mm/min","C.暂停1300秒","D.快速定位到(1100,1050)"],"ans":"B","tip":"G90绝对坐标下，G01以1300mm/min进给率直线移动到(1100,1050)。","cate":"程序代码"}, {"q":"G91 G01 X-120 Y-110 F350表示？","opt":["A.暂停120秒","B.主轴转速110","C.移动到(-120,-110)","D.X负移120，Y负移110"],"ans":"D","tip":"G91增量模式下，G01以350mm/min进给率向X负方向移动120，Y负方向移动110。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.程序末尾","B.随机位置","C.程序开头","D.下一程序段"],"ans":"C","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效时，若面板开关OFF，程序会？","opt":["A.跳过M01继续执行","B.暂停在M01处","C.报警","D.结束程序"],"ans":"A","tip":"M01为选择性暂停，开关OFF时自动跳过该指令，不影响加工流程。","cate":"程序代码"}, {"q":"G04 P5000表示暂停？","opt":["A.5000秒","B.5000转","C.5分钟","D.5秒"],"ans":"D","tip":"G04 P_单位为毫秒，P5000即暂停5000毫秒（5秒）。","cate":"程序代码"}, {"q":"G17 G02 X300 Y300 I110 J0表示？","opt":["A.YZ平面直线","B.XZ平面逆时针圆弧","C.XY平面顺时针圆弧，圆心X+110","D.三维螺旋"],"ans":"C","tip":"G17选XY平面，G02顺时针圆弧，I110 J0表示圆心在X方向正偏移110。","cate":"程序代码"}, {"q":"G41 G01 X550 Y500 D11中，D11的作用是？","opt":["A.指定刀具号","B.设定进给速度","C.选择主轴转速","D.调用11号半径补偿"],"ans":"D","tip":"D11指定使用11号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X1000 Z1100设定后，若刀具实际位置是X450 Z450，则工件原点在？","opt":["A.机床坐标(X550,Z650)","B.机床坐标(X1000,Z1100)","C.随机位置","D.机床坐标(X450,Z450)"],"ans":"B","tip":"G92将当前点（X450,Z450）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X1000,Z1100)。","cate":"程序代码"}, {"q":"G96 S1050在直径4mm处的转速约为？","opt":["A.83521 r/min","B.41760 r/min","C.20880 r/min","D.1050 r/min"],"ans":"A","tip":"n=(1000×1050)/(3.14×4)≈83521 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S5500与G96 S5500在直径8mm处的转速分别是？","opt":["A.5500 r/min 和 5500 r/min","B.5500 r/min 和 218750 r/min","C.218750 r/min 和 5500 r/min","D.无法确定"],"ans":"B","tip":"G97固定5500r/min；G96下n=(1000×5500)/(3.14×8)≈218750 r/min。","cate":"程序代码"}, {"q":"M06 T50 M03 S5000的正确执行流程是？","opt":["A.换刀→选50号刀→主轴正转","B.无效指令","C.主轴正转→选50号刀→换刀","D.选50号刀→换刀→主轴正转5000r/min"],"ans":"D","tip":"T50选择刀具，M06执行换刀，M03 S5000启动主轴，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H22 Z-280.0中，若H22=11.0，实际Z深度是？","opt":["A.0","B.-269.0","C.-291.0","D.-280.0"],"ans":"B","tip":"G43正补偿：实际深度=编程值+补偿值=-280.0+11.0=-269.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G03，系统会？","opt":["A.执行快速移动","B.正常执行圆弧插补","C.报警（无循环）","D.调用子程序"],"ans":"C","tip":"G80取消固定循环后，G02/G03需重新指定平面（G17/G18/G19）才能执行。","cate":"程序代码"}, {"q":"G84攻丝循环中，主轴反转退出是为了？","opt":["A.匹配螺纹旋向","B.减少热量","C.提高转速","D.保护刀具"],"ans":"A","tip":"攻丝时主轴反转退出可匹配螺纹旋向，防止乱扣或断丝锥。","cate":"程序代码"}, {"q":"G76精镗循环中，主轴定向后让刀方向是？","opt":["A.沿圆弧切线","B.垂直于进给方向","C.平行于主轴轴线","D.随机方向"],"ans":"B","tip":"主轴定向后刀具向垂直进给方向让刀，避免退刀划伤已加工表面。","cate":"程序代码"}, {"q":"G50 S7500限制的是？","opt":["A.最大切削深度7500mm","B.最大刀具半径7500mm","C.最快进给速度7500mm/min","D.最高主轴转速7500r/min"],"ans":"D","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S1100在直径3mm处的转速约为？","opt":["A.116755 r/min","B.29188 r/min","C.1100 r/min","D.58377 r/min"],"ans":"A","tip":"n=(1000×1100)/(3.14×3)≈116755 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，适合加工？","opt":["A.塑料","B.铝合金","C.高温合金等难加工材料","D.木材"],"ans":"C","tip":"混合冷却（雾状+液态）可增强散热，适合钛合金、镍基合金等难加工材料。","cate":"程序代码"}, {"q":"G28 X900 Z1100表示？","opt":["A.先移动到(900,1100)再返回参考点","B.开启镜像","C.取消补偿","D.移动到(900,1100)"],"ans":"A","tip":"G28使刀具先快速移动到X900 Z1100（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P12000 N150表示？","opt":["A.主轴转速150","B.#14=150","C.刀具号150","D.进给速度150"],"ans":"B","tip":"G65调用宏程序时，N对应#14变量，N150即#14=150。","cate":"程序代码"}, {"q":"G68 X800 Y800 R240表示？","opt":["A.镜像240°","B.缩放240%","C.绕(800,800)旋转240°","D.平移240mm"],"ans":"C","tip":"G68以(X800,Y800)为旋转中心，R240设定旋转角度240度。","cate":"程序代码"}, {"q":"G51.1 Y90表示？","opt":["A.缩放Y轴90%","B.以Y=90为对称轴镜像","C.旋转Y轴90°","D.平移Y轴90mm"],"ans":"B","tip":"G51.1 Y90以Y=90的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L20 P12 R14.0表示？","opt":["A.设置12号刀半径补偿为14.0","B.开启循环","C.调用子程序12000","D.修改12号刀长补偿"],"ans":"A","tip":"G10 L20 P12设置12号刀具半径补偿值（R14.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H18 Z1100.0中，若H18=13.0，实际位置是？","opt":["A.Z13.0","B.Z1100.0","C.Z1113.0","D.Z1087.0"],"ans":"C","tip":"G44负补偿：实际位置=编程值+补偿值=1100.0+13.0=1113.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G44，需要？","opt":["A.更换刀具","B.无需操作","C.重启系统","D.重新指定H代码"],"ans":"D","tip":"G49取消补偿后，再次启用G44需重新指定H代码（如G44 H10）。","cate":"程序代码"}, {"q":"G41 D13中，D13的数值来源是？","opt":["A.刀具半径补偿表","B.主轴参数","C.进给参数","D.刀具长度表"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，D13对应表中第13号半径补偿值。","cate":"程序代码"}, {"q":"G90 G01 X1200 Y1150 F1400表示？","opt":["A.增量移动1200","B.快速定位到(1200,1150)","C.暂停1400秒","D.直线插补到(1200,1150)，进给1400mm/min"],"ans":"D","tip":"G90绝对坐标下，G01以1400mm/min进给率直线移动到(1200,1150)。","cate":"程序代码"}, {"q":"G91 G00 X-130 Y-120表示？","opt":["A.移动到(-130,-120)","B.暂停130秒","C.X负移130，Y负移120","D.主轴转速120"],"ans":"C","tip":"G91增量模式下，G00使刀具从当前位置向X负方向移动130，Y负方向移动120。","cate":"程序代码"}, {"q":"M30执行后，冷却液状态是？","opt":["A.保持开启","B.切换为雾状","C.随机状态","D.自动关闭"],"ans":"D","tip":"M30结束程序时会自动关闭切削液，确保设备安全。","cate":"程序代码"}, {"q":"M01与M00在面板开关ON时的区别是？","opt":["A.M00无条件暂停，M01有条件暂停","B.两者都有条件暂停","C.两者都无条件暂停","D.随机结果"],"ans":"A","tip":"M00始终暂停，M01仅在开关ON时暂停，用于调试或抽检。","cate":"程序代码"}, {"q":"G04 X20表示暂停？","opt":["A.20分钟","B.20毫秒","C.20秒","D.20转"],"ans":"C","tip":"G04 X_单位为秒，X20即暂停20秒，常用于孔底光整或让刀。","cate":"程序代码"}, {"q":"G17 G03 X320 Y320 I-120 J0表示？","opt":["A.XZ平面顺时针圆弧","B.三维螺旋","C.YZ平面直线","D.XY平面逆时针圆弧，圆心X-120"],"ans":"D","tip":"G17选XY平面，G03逆时针圆弧，I-120 J0表示圆心在X方向负偏移120。","cate":"程序代码"}, {"q":"G41 G01 X600 Y550 D12中，D12的作用是？","opt":["A.选择主轴转速","B.设定进给速度","C.调用12号半径补偿","D.指定刀具号"],"ans":"C","tip":"D12指定使用12号刀具半径补偿寄存器，确保轮廓加工尺寸准确。","cate":"程序代码"}, {"q":"G92 X1100 Z1200设定后，若刀具实际位置是X500 Z500，则工件原点在？","opt":["A.机床坐标(X600,Z700)","B.随机位置","C.机床坐标(X500,Z500)","D.机床坐标(X1100,Z1200)"],"ans":"D","tip":"G92将当前点（X500,Z500）定义为工件原点（X0,Z0），因此工件原点对应机床坐标(X1100,Z1200)。","cate":"程序代码"}, {"q":"G96 S1150在直径5mm处的转速约为？","opt":["A.18309 r/min","B.1150 r/min","C.73239 r/min","D.36619 r/min"],"ans":"C","tip":"n=(1000×1150)/(3.14×5)≈73239 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"G97 S6000与G96 S6000在直径6mm处的转速分别是？","opt":["A.无法确定","B.6000 r/min 和 6000 r/min","C.318310 r/min 和 6000 r/min","D.6000 r/min 和 318310 r/min"],"ans":"D","tip":"G97固定6000r/min；G96下n=(1000×6000)/(3.14×6)≈318310 r/min。","cate":"程序代码"}, {"q":"M06 T55 M04 S5500的正确执行流程是？","opt":["A.无效指令","B.选55号刀→换刀→主轴反转5500r/min","C.换刀→选55号刀→主轴反转","D.主轴反转→选55号刀→换刀"],"ans":"B","tip":"T55选择刀具，M06执行换刀，M04 S5500启动主轴反转，顺序错误可能导致事故。","cate":"程序代码"}, {"q":"G43 H24 Z-300.0中，若H24=12.0，实际Z深度是？","opt":["A.-300.0","B.0","C.-312.0","D.-288.0"],"ans":"D","tip":"G43正补偿：实际深度=编程值+补偿值=-300.0+12.0=-288.0（假设Z轴向下为负）。","cate":"程序代码"}, {"q":"G80后若执行G01，系统会？","opt":["A.报警","B.执行快速移动","C.正常执行直线插补","D.调用子程序"],"ans":"C","tip":"G80仅取消固定循环，G01仍为有效模态指令，可继续执行直线插补。","cate":"程序代码"}, {"q":"G84攻丝循环中，F值必须与什么匹配？","opt":["A.螺距","B.切削深度","C.刀具直径","D.主轴转速"],"ans":"A","tip":"攻丝时F值必须等于螺纹螺距，否则会导致乱扣或螺纹不合格。","cate":"程序代码"}, {"q":"G76精镗循环中，Q值过小会导致？","opt":["A.主轴过载","B.让刀不足划伤孔壁","C.进给过快","D.刀具断裂"],"ans":"B","tip":"Q值（让刀量）过小会导致退刀时刀具擦伤孔壁，需根据孔径合理设定。","cate":"程序代码"}, {"q":"G50 S8000限制的是？","opt":["A.最高主轴转速8000r/min","B.最大刀具半径8000mm","C.最快进给速度8000mm/min","D.最大切削深度8000mm"],"ans":"A","tip":"G50 S_限制主轴最高转速，防止恒线速加工时小直径区域超速。","cate":"程序代码"}, {"q":"G96 S1200在直径4mm处的转速约为？","opt":["A.1200 r/min","B.47746 r/min","C.95493 r/min","D.23873 r/min"],"ans":"C","tip":"n=(1000×1200)/(3.14×4)≈95493 r/min，符合恒线速转速计算公式。","cate":"程序代码"}, {"q":"M07与M08同时开启时，冷却液压力？","opt":["A.随机变化","B.减小","C.不变","D.增大"],"ans":"D","tip":"混合冷却模式下，雾状与液态同时喷射，整体冷却压力和流量增大。","cate":"程序代码"}, {"q":"G28 X1000 Z1200表示？","opt":["A.移动到(1000,1200)","B.先移动到(1000,1200)再返回参考点","C.开启镜像","D.取消补偿"],"ans":"B","tip":"G28使刀具先快速移动到X1000 Z1200（中间点），再返回参考点。","cate":"程序代码"}, {"q":"G65 P13000 O160表示？","opt":["A.进给速度160","B.刀具号160","C.主轴转速160","D.#15=160"],"ans":"D","tip":"G65调用宏程序时，O对应#15变量，O160即#15=160。","cate":"程序代码"}, {"q":"G68 X900 Y900 R270表示？","opt":["A.平移270mm","B.缩放270%","C.绕(900,900)旋转270°","D.镜像270°"],"ans":"C","tip":"G68以(X900,Y900)为旋转中心，R270设定旋转角度270度。","cate":"程序代码"}, {"q":"G51.1 X90表示？","opt":["A.平移X轴90mm","B.以X=90为对称轴镜像","C.缩放X轴90%","D.旋转X轴90°"],"ans":"B","tip":"G51.1 X90以X=90的直线为对称轴，生成镜像加工路径。","cate":"程序代码"}, {"q":"G10 L21 P13 R15.0表示？","opt":["A.修改13号刀长补偿","B.调用子程序13000","C.设置13号刀半径补偿为15.0","D.开启循环"],"ans":"C","tip":"G10 L21 P13设置13号刀具半径补偿值（R15.0），实现自动补偿更新。","cate":"程序代码"}, {"q":"G44 H20 Z1200.0中，若H20=14.0，实际位置是？","opt":["A.Z1186.0","B.Z1200.0","C.Z14.0","D.Z1214.0"],"ans":"D","tip":"G44负补偿：实际位置=编程值+补偿值=1200.0+14.0=1214.0（假设Z轴向上为正）。","cate":"程序代码"}, {"q":"G49执行后，若需再次使用G43，需要？","opt":["A.无需操作","B.更换刀具","C.重新指定H代码","D.重启系统"],"ans":"C","tip":"G49取消补偿后，再次启用G43需重新指定H代码（如G43 H11）。","cate":"程序代码"}, {"q":"G41 D14中，D14的数值类型是？","opt":["A.半径值","B.长度值","C.角度值","D.转速值"],"ans":"A","tip":"D代码调用刀具半径补偿寄存器，存储的是刀具半径数值。","cate":"程序代码"}, {"q":"G90 G01 X1300 Y1250 F1500表示？","opt":["A.快速定位到(1300,1250)","B.增量移动1300","C.直线插补到(1300,1250)，进给1500mm/min","D.暂停1500秒"],"ans":"C","tip":"G90绝对坐标下，G01以1500mm/min进给率直线移动到(1300,1250)。","cate":"程序代码"}, {"q":"G91 G01 X-140 Y-130 F400表示？","opt":["A.主轴转速130","B.移动到(-140,-130)","C.暂停140秒","D.X负移140，Y负移130"],"ans":"D","tip":"G91增量模式下，G01以400mm/min进给率向X负方向移动140，Y负方向移动130。","cate":"程序代码"}, {"q":"M30执行后，程序光标位于？","opt":["A.程序末尾","B.随机位置","C.程序开头","D.下一程序段"],"ans":"C","tip":"M30结束程序并复位光标至首行，便于下次循环加工。","cate":"程序代码"}, {"q":"M01生效时，若面板开关OFF，程序会？","opt":["A.跳过M01继续执行","B.结束程序","C.报警","D.暂停在M01处"],"ans":"A","tip":"M01为选择性暂停，开关OFF时自动跳过该指令，不影响加工流程。","cate":"程序代码"}, {"q":"G04 P6000表示暂停？","opt":["A.6000秒","B.6000转","C.6分钟","D.6秒"],"ans":"D","tip":"G04 P_单位为毫秒，P6000即暂停6000毫秒（6秒）。","cate":"程序代码"}, {"q":"G17 G02 X350 Y350 I130 J0表示？","opt":["A.XY平面顺时针圆弧，圆心X+130","B.YZ平面直线","C.XZ平面逆时针圆弧","D.三维螺旋"],"ans":"A","tip":"G17选XY平面，G02顺时针圆弧，I130 J0表示圆心在X方向正偏移130。","cate":"程序代码"} ]