Automation System
A process controller:

All of these
can interface to digital and analog I/O
can solve a PID process control equation easily
None of these
is useful in a continuous process control application

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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.
Uses an electron gun to continuously flood the surface of the tube.
Makes changes on the image by increasing the anode voltage.
Creates images on the screen by scanning straight-line vectors between selected points.

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