Automation System
Most data transmission in the future will be:

carried over metallic telephone lines
None of these
analog in nature
All of these
digital bit stream encoded data

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Automation System
What is offset error?

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

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