Automation System
The difference between CAD and CAM is that CAD software is directed at product design while CAM software is:

specifically for PC-board design
designed for communications
None of these
concerned with management programs
concerned with production and control of tool design

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Automation System
A dc servo motor:

All of these
None of these
can provide precise position control
uses a variable dc voltage for speed control
uses a tachometer for speed feedback

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