Automation System
The APT (automatically progra-mmed tools) language is used with:

None of these
numerical controlled machines.
programmable controllers
large automation systems
drafting systems

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Automation System
D/A (digital to analog) conversion:

must be fed through a filter to reproduce the original signal accurately
results in a binary code as the final output
has to be sampled at 1/2 the highest input frequency
both (b) and (c)
None of these

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Automation System
What is proportional control?

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

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