Automation System
An aneroid barometer

is very unreliable
can measure only atmospheric pressure
measures pressure by sensing deflection of an evacuated chambers.
None of these
can be used to measure gas or liquid flow rates

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

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

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