Automation System
A semi-continuous operation means:

a computer is a required part of the machine
the operation is continuous each shift, but stops between shifts
coffee breaks are allowed for the operator
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
None of these

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Automation System
What is proportional control?

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

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