Automation System
The program execution time:

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

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Automation System
Programmable controllers:

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

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Automation System
What is proportional control?

The controller output varies continuously over a range
All of these
None of these
The gain is independent of offset error.
It has a discrete output for each error value

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Automation System
The SKETCHPAD system

is expensive because it is sophisticated and make demands on the power and resources of the computer.
None of these
consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
All of these
is used for interactive Graphics

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