Automation System
Which document sums up the general provisions of purchase, terms and agreement, warranties, and maintenance?

The purchasing report
The project evaluation
None of these
The contract
The financial report.

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Automation System
Relay ladder logic is used in a PC because:

it is impossible to write a control program for a machine in any other logic
None of these
All of these
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
it is the best industrial control language ever developed.

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Automation System
What is offset error?

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

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