Automation System
Time proportioning control:

is less efficient than normal PID control
cannot use a TM990 micro¬computer
can be used on a PM550 programmable process controller
None of these
a and b above.

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Automation System
What is the process lag?

The time it takes for the sensor to respond to a changed.
The lag in the error signal when the setpoint is changed.
The time it takes for the mass of the process to respond to an input change.
None of these
All of these

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