Automation System
An aneroid barometer

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

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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
integral control has slower response to an error signal.
All of these
derivative control does not eliminate offset error
None of these

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Automation System
A venturi tube:

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

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Automation System
Direct Numerical Control means:

None of these
complete elimination of a need for a human operator.
eliminating computers from the manufacturing process
using one computer to control several machines
using several computers to control one large machine

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