Automation System
What is proportional control?

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

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Automation System
A venturi tube:

is made only of metal
None of these
can be used to measure gas or liquid flow rates
measures the presence of a liquid
is extremely difficult to use

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Automation System
How is the integral mode implemented on a digital controller?

All of these
None of these
the error is divided into discrete amounts
the error signal is summed over a discrete time interval and accumulated by the controller
the digital controller cannot handle integral mode

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