Automation System
A stepping motor;

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

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

Makes changes on the image by increasing the anode voltage.
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.
None of these
The beam constantly travels across the screen to turn on/off a series of pixels.

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