Automation System
Digitizers can be converted from "dumb" to "smart" through the addition of:

an electromagnetic coupling
keyboard
a scanner
None of these
a microprocessor

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

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

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