puters 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 softputer, 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.
A: The depth of cut
B: The cutting speed
C: The feed
D: The spindle
puter-aided programming
答案:
第五章
1、Never attempt to machine a pensation function,you should check the direction and amount of pensation.
A:对
B:错
答案:
4、Incorrect operation may lead to ____.
A: serious machine troubles
B: injuries
C: puter
答案:
第六章
1、CNC diagnostic support at present includes four basic categories: start-up diagnostics,
on-line diagnostics, off-line diagnostics and background diagnostics.
A:对
B:错
答案:
2、Start-Up Diagnostics are a diagnostic routine that regularly operate automatically when the CNC is switched on.
ing the developing trend of factories.
A:对
B:错
答案:
4、By connecting ____ to the personal puter and the CNC, the programmer can transfer programs from the puter to the CNC.
A: a cable
B:a line
C: a software
D: a hardware
答案:
5、What does CAD mean?
A: Controller Aided Design
B: Computer Aided Design
C: Controller Aided Diagram
D: Computer Aided Diagram
答案:
第八章
1、Not only most of major machine tool manufacturers but also the CNC suppliers offer a wide variety of end-user training on CNC machines.
A:对
B:错
答案:
2、During the early years of hardwired NC, built-in diagnostic tools existed.
A:对
B:错
答案:
3、The emphasis has changed fromhow to fix it tohow it works.
A:对
B:错
答案:
4、The function of direct current regulated power supply is to input an alternating current power of 220volts, so that it can output __.
A: direct current 24 volts voltage
B:alternating current 24 volts voltage
C: direct current 200 volts voltage
D: alternating current 200 volts voltage
答案:
5、FANUC control system works under a _volts voltage.
A: direct current 200
B:alternating current 200
C: direct current 24
D: alternating current 24
答案:
pletely the same as the NC technology in every plete aircraft may be designed without a CAD/CAM system.
A:对
B:错
答案:
2、Advanced CAD/CAM systems include not only solid geometry modeling capability but also NC verification programs.
A:对
B:错
答案:
3、Generally speaking, a CAD system is an analytic tool for design.
A:对
B:错
答案:
4、To avoid accidents, read safety guidelines and related ____ carefully and operate the system correctly.
A: menus
B: manuals
C: minuses
D: manes
答案:
5、If the NC machine tool is used in a wrong manner, it will ____ serious injuries and machine damages.
A: lead to
B:result from
C: due to
D: responsible for
答案:
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