Automation System
Today, programmable controllers:

can be cost effective even when replacing just a few relays
are more powerful then the first controllers on the market
are relatively low cost compared with the original digital equipment available for industrial control
All of these
None of these

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

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

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Automation System
Trend analysis:

is a brand new concept
can improve control system response
None of these
is used only in financial planning
requires a very expensive system to implement

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