Automation System
The program counter:

decides which program to run
is where arithmetic is done in a computer.
None of these
contains the address of the next instruction to be executed
counts the number of instructions that have been executed

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Automation System
A dc servo motor:

can provide precise position control
uses a tachometer for speed feedback
All of these
uses a variable dc voltage for speed control
None of these

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

None of these
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.

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