Automation System
Four basic elements are required for an automated machine tool or production process. They are: input interface, memory, output interface and:

software
logic
computer graphics workstation
NC tape programming
None of these

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Automation System
A dc servo motor:

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

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Automation System
Most industrial control applications:

must have the process specified correctly to be successful
can be solved using more than one method of control
can be done more reliably using solid-state methods
All of these
None of these

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