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

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

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Automation System
Ergonomics refers to:

the human aspect of the environment around the workstation as well as the workstation itself
the technology involved in the workstation itself
the level of involvement the operator has with the workstation
None of these
the cost relationship of the workstation versus productivity

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Automation System
Programmable controllers:

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

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