Automation System
What is offset error?

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

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Automation System
The refresh-vector CRT uses which of the following techniques?

Creates images on the screen by scanning straight-line vectors between selected points.
None of these
Makes changes on the image by increasing the anode voltage.
Uses an electron gun to continuously flood the surface of the tube.
The beam constantly travels across the screen to turn on/off a series of pixels.

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Automation System
A stepping motor;

None of these
is a good choice where continuous rotation is needed
has a commutator
can index positional movement.
has a speed proportional to voltage input

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