Automation System
What is offset error?

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

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Automation System
An encoder:

is used to send telegraph signals
converts an input to a binary number
can have only four keys
converts a binary number to a decimal number.
None of these

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Automation System
The refresh-vector CRT uses which of the following techniques?

Creates images on the screen by scanning straight-line vectors between selected points.
None of these
Uses an electron gun to continuously flood the surface of the tube.
Makes changes on the image by increasing the anode voltage.
The beam constantly travels across the screen to turn on/off a series of pixels.

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Automation System
Trend analysis:

requires a very expensive system to implement
None of these
is a brand new concept
is used only in financial planning
can improve control system response

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