Automation System
An operating system:

All of these
is useless in most control applications
None of these
provides ability for other programmers to understand the software structure
can help reduce software development time

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Automation System
A venturi tube:

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

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Automation System
What is offset error?

All of these
the difference between the controller output and the setting of the manipulated variable.
the difference between the control setpoint value and the actual value.
None of these
the difference between the sensor input and the absolute sensed parameter.

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