Automation System
Sensors:

probably will not improve over the next decade
are easily developed
will be much smarter and more sophisticated in the future
None of these
are not important in automation

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Automation System
What is proportional control?

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

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

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

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Automation System
What is offset error?

the difference between the sensor input and the absolute sensed parameter.
All of these
the difference between the controller output and the setting of the manipulated variable.
None of these
the difference between the control setpoint value and the actual value.

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