Automation System
In general, American buyers will purchase goods:

that offer the best quality for the least money.
that are made in America, even at higher costs.
without regard to country of manufacturer.
(a) and (c)
None of these

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

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

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Automation System
Programmable controllers:

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

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Automation System
A semi-continuous operation means:

each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
a computer is a required part of the machine
coffee breaks are allowed for the operator
the operation is continuous each shift, but stops between shifts
None of these

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