Automation System
Analog and digital controllers:

All of these
can be changed with equal case
cost the same to build
accept the same input signals
None of these

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Automation System
An aneroid barometer

measures pressure by sensing deflection of an evacuated chambers.
can measure only atmospheric pressure
can be used to measure gas or liquid flow rates
None of these
is very unreliable

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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 does not eliminate offset error
derivative control responds to a change in the rate of change in the error signal

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Automation System
Microcomputer-based control sys-tems

will tend to increase in cost.
will have more standard industrial application software available in the future.
None of these
All of these
will just keep their present capability

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