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

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

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Automation System
Programmable controllers:

None of these
are widely used in many different industries
are programmed using relay ladder logic
cannot perform functions other than relay logic
(a) and (c) above

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Automation System
The program execution time:

will vary depending on the language used
All of these
must be slower than the fastest mechanical operation that is to be controlled
None of these
cannot be changed once the program is written

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Automation System
A flip-flop:

(a) and (c)
is a sequential logic device
remembers what was previously stored in it
None of these
is a combinational logic device

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