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

None of these
computer graphics workstation
NC tape programming
software
logic

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Automation System
What is the difference between integral and derivative control?

All of these
None of these
integral control has slower response to an error signal.
derivative control responds to a change in the rate of change in the error signal
derivative control does not eliminate offset error

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