Automation System
The device that assembles groups of characters into complete messages prior to their entering the CPU is called:

a communications processor
a compiler
None of these
an interpreter
an editor

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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.
the difference between the sensor input and the absolute sensed parameter.
None of these
All of these

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

it is the best industrial control language ever developed.
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 impossible to write a control program for a machine in any other logic
None of these

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