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

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

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

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

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Automation System
A sequence controller:

performs on/off control functions in relation to time.
is no longer in widespread use
is difficult to program
None of these
is a mechanical only controller

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