Automation System
A semi-continuous operation means:

None of these
the operation is continuous each shift, but stops between shifts
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
coffee breaks are allowed for the operator
a computer is a required part of the machine

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

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.
Creates images on the screen by scanning straight-line vectors between selected points.
The beam constantly travels across the screen to turn on/off a series of pixels.

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