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

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

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

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

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