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 flip-flop:

is a sequential logic device
remembers what was previously stored in it
(a) and (c)
is a combinational logic device
None of these

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Automation System
How is the integral mode implemented on a digital controller?

None of these
the digital controller cannot handle integral mode
the error is divided into discrete amounts
the error signal is summed over a discrete time interval and accumulated by the controller
All of these

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Automation System
The program execution time:

None of these
cannot be changed once the program is written
All of these
will vary depending on the language used
must be slower than the fastest mechanical operation that is to be controlled

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