Automation System
A programmable controller:

None of these
is easier to troubleshoot than standard relay logic
allows faster machine checkout
both (a) and (b)
All of these

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Automation System
Semiconductor devices:

None of these
usually have a very short MTBF (mean time between failure)
have a very short infant mortality period
All of these
are less reliable than electro¬mechanical components

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Automation System
What is proportional control?

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

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

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

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