1、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、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、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、数字模拟转换器的英语全称是
A:Analog Digital Converter
B:Digital Analog Converter
C:Central Processing Unit
D:Basic Revolution Unit
答案: Central Processing Unit
5、模拟数字转换器的英语缩写是____
A:APT
B:DDT
C:DDC
D:ADC
答案: ADC
第二章
1、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、DNC is short for direct numerical control.
A:对
B:错
答案: 对
3、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、The part program contains a description of the _.
A:program
B:geometry
C:data
D:parameter
答案: geometry
5、Several machine tools are directly controlled by a central computer, this is the _.
A:NC
B:CNC
C:BNC
D:DNC
答案: DNC
第三章
1、As NC machines need a large capital investment, we should efficiently use them.
A:对
B:错
答案:
2、Machining is the manufacturing in which the workers can remove the excess material of a part on a machine tool.
A:对
B:错
答案:
3、The feed is defined as the distance the cutting tool projects below the original surface of the work-piece.
A:对
B:错
答案:
4、____is the relative lateral movement between the tool and the work-piece.
