窍镣竞萝谜清扭鼓篇途赎讳卡
(。◕‿◕。)
第一章 单元测试
1、判断题:
Numerical control is designed to control the operation of a machine tool by a series of coded instructions called a program.
A:对
B:错
答案: 对
2、判断题:
A part program is stored in the form of blocks of information, and each block has the numerical data needed to manufacture a segment of the work-piece.
A:对
B:错
答案: 对
3、判断题:
Like a conventional machine tool, the NC system can’t replace the manual actions of the operator either.
A:对
B:错
答案: 错
4、单选题:
数字模拟转换器的英语全称是
A:Analog Digital Converter
Bigital Analog Converter
C:Central Processing Unit
D:Basic Revolution Unit
答案: Central Processing Unit
5、单选题:
模拟数字转换器的英语缩写是________
A:APT
BDT
CDC
D:ADC
答案: ADC
第二章 单元测试
1、判断题:
An important advance in the philosophy of NC of machine tools was the shift toward the use of controller units instead of computers in NC systems.
A:对
B:错
答案: 错
2、判断题:
DNC is short for direct numerical control.
A:对
B:错
答案: 对
3、判断题:
One of the aims of CNC systems is to replace as much of the conventional NC software with hardware as possible.
A:对
B:错
答案: 错
4、单选题:
The part program contains a description of the _________.
A:program
B:geometry
C:data
D:parameter
答案: geometry
5、单选题:
Several machine tools are directly controlled by a central computer, this is the _________.
A:NC
B:CNC
C:BNC
DNC
答案: DNC
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