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

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

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Automation System
A sequence controller:

is no longer in widespread use
is a mechanical only controller
is difficult to program
None of these
performs on/off control functions in relation to time.

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