Automation System
Four basic elements are required for an automated machine tool or production process. They are: input interface, memory, output interface and:

logic
None of these
computer graphics workstation
software
NC tape programming

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Automation System
Programmable controllers:

cannot perform functions other than relay logic
(a) and (c) above
are programmed using relay ladder logic
are widely used in many different industries
None of these

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

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

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