Automation System
The new industrial revolution has been caused by:

None of these
advances in electronics
the Vietnam War
social unrest
demand for higher wages

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Automation System
A solenoid:

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

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Automation System
What is the difference between integral and derivative control?

integral control has slower response to an error signal.
derivative control does not eliminate offset error
derivative control responds to a change in the rate of change in the error signal
All of these
None of these

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Automation System
A dc servo motor:

All of these
uses a tachometer for speed feedback
None of these
can provide precise position control
uses a variable dc voltage for speed control

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