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

All of these
integral control has slower response to an error signal.
None of these
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
Time proportioning control:

can be used on a PM550 programmable process controller
cannot use a TM990 micro¬computer
None of these
a and b above.
is less efficient than normal PID control

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Automation System
What is proportional control?

None of these
All of these
It has a discrete output for each error value
The controller output varies continuously over a range
The gain is independent of offset error.

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