Automation System
A proportional plus integral contro-ller can:

both (b) and (c)
has no transient response
None of these
can compensate for lag
can increase the system type

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

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

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Automation System
A dc servo motor:

All of these
None of these
uses a variable dc voltage for speed control
can provide precise position control
uses a tachometer for speed feedback

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