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
concerned with management programs
concerned with production and control of tool design
None of these

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Automation System
A dc servo motor:

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

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