Automation System
A process controller:

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

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

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.
The beam constantly travels across the screen to turn on/off a series of pixels.
None of these

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Automation System
A solenoid:

is spring operated
can be used only in de circuits
None of these
is widely used in industrial automation
is related to an aneroid

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