Automation System
One of the following is not considered a method of input control in a CAD system.

None of these
Programmable function box
Plotter
Joystick
Touch terminal

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Automation System
A dc servo motor:

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

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Automation System
Semiconductor devices:

All of these
have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
None of these
are less reliable than electro¬mechanical components

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