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单选题 目前世界先进的CNC数控系统的平均无故障时间(MTBF)大部分在( )之间.(At present, the mean time between failures (MTBF) of the advanced CNC systems in the world is mostly between ( ).)

A. 1000~10000小时(A. 1,000~10,000 hours)

B. 10000~100000小时(B. 10,000~100,000 hours)

C. 10000~30000小时(C. 10,000~30,000 hours)

D. 30000~100000小时(D. 30,000~100,000 hours)

用数控机床加工零部件(数控机床编程与操作)Processing Parts with CNC Machine Tools课程封面

学科：用数控机床加工零部件(数控机床编程与操作)Processing Parts with CNC Machine Tools

时间：2024-09-13 13:29:38

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题目1
单选题
数控机床常见的机械故障表现有传动噪声大和( )等.( Common mechanical faults of CNC machine tools include loud transmission noise and ( ).)
A. 系统不稳定(A. System instability)B. 插补精度差(B. Poor interpolation accuracy)C. 运行阻力大(C. Large running resistance)D. 电子器件损坏(D. Damage of electronic devices)
题目2
单选题
过流报警是属于何种类型的报警( ).(The overcurrent alarm belongs to ( ).)
A. 系统报警(A. System alarm)B. 机床侧报警(B. Machine tool side alarm)C. 伺服单元报警(C. Servo unit alarm)D. 电机报警(D. Motor alarm)
题目3
单选题
数控机床的条件信息指示灯EMERGENCY STOP亮时,说明( ).(When the condition information indicator EMERGENCY STOP of the CNC machine tool is on, it indicates that ( ).)
A. 按下急停按扭(A. The emergency stop button is pressed)B. 主轴可以运转(B. The spindle can run)C. 回参考点(C. The reference point is returned)D. 操作错误且未消除(D. There is an operation error not eliminated)
题目4
单选题
当NC故障排除后,按( )键消除报警.( After the NC fault is eliminated, press the ( ) key to eliminate the alarm.)
A. RESET(A.RESET)B. GRAPH(B.GRAPH)C. PAPAM(C.PAPAM)D. MACRO(D.MACRO)
题目5
单选题
判断数控机床的可靠度主要根据( ).(The reliability of CNC machine tool is judged mainly based on ( ).)
A. 机床精度(A. Accuracy of machine tool)B. 机床机械效率(B. Mechanical efficiency of machine tool)C. 机床实际无故障工作概率(C. Actual trouble-free working probability of machine tool)D. 机床生产率(D. Productivity of machine tool)
题目6
单选题
目前世界先进的CNC数控系统的平均无故障时间(MTBF)大部分在( )之间.(At present, the mean time between failures (MTBF) of the advanced CNC systems in the world is mostly between ( ).)
A. 1000~10000小时(A. 1,000~10,000 hours)B. 10000~100000小时(B. 10,000~100,000 hours)C. 10000~30000小时(C. 10,000~30,000 hours)D. 30000~100000小时(D. 30,000~100,000 hours)
题目7
单选题
按故障出现的频次分类,数控系统故障分为( ).(According to the frequency of faults, the CNC system faults are divided into ( ).)
A. 硬件故障和软件故障(A. Hardware fault and software fault)B. 随机性故障和系统性故障(B. Random fault and systematic fault)C. 机械故障和电气故障(C. Mechanical fault and electrical fault)D. 有报警故障和无报警故障(D. Alarm fault and no-alarm fault)
题目8
单选题
数控机床发生故障后操作人员首先应( ).(When the CNC machine tool fails, the operator shall ( ) first.)
A. 立即报告维修人员(A. Immediately report to the maintenance personnel)B. 立即切断电源(B. Cut off the power supply immediately)C. 设法保持现状(C. Manage to maintain the current status)D. 动手排除(D. Perform the troubleshooting)
题目9
单选题
某个程序在运行过程中,数控系统出现"软限位开关超程"报警,这属于( ).(When a program is running, the CNC system gives an alarm of "soft limit switch overtravel", which belongs to ( ).)
A. 程序错误报警(A. Program error alarm)B. 操作报警(B. Operation alarm)C. 驱动报警(C. Drive alarm)D. 系统错误报警(D. System error alarm)
题目10
单选题
数控系统的报警大体可以分为操作报警,程序错误报警,驱动报警及系统错误报警,显示"没有Y轴反馈"这属于( ).(The alarms of the CNC system can be roughly classified into operation alarm, program error alarm, drive alarm and system error alarm, and the display of "no Y-axis feedback" is classified as ( ).)
A. 操作错误报警(A. Operation error alarm)B. 程序错误报警(B. Program error alarm)C. 驱动错误报警(C. Drive error alarm)D. 系统错误报警(D. System error alarm)
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