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

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

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Automation System
Direct Numerical Control means:

None of these
using one computer to control several machines
eliminating computers from the manufacturing process
using several computers to control one large machine
complete elimination of a need for a human operator.

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Automation System
A sequence controller:

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

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