Automation System
A solenoid:

can be used only in de circuits
is spring operated
None of these
is widely used in industrial automation
is related to an aneroid

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Automation System
What is offset error?

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

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Automation System
A semi-continuous operation means:

each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
None of these
coffee breaks are allowed for the operator
the operation is continuous each shift, but stops between shifts
a computer is a required part of the machine

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