Automation System
Most industrial control applications:

None of these
can be done more reliably using solid-state methods
must have the process specified correctly to be successful
All of these
can be solved using more than one method of control

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Automation System
Today, programmable controllers:

can be cost effective even when replacing just a few relays
All of these
are more powerful then the first controllers on the market
are relatively low cost compared with the original digital equipment available for industrial control
None of these

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Automation System
What is the process lag?

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
The time it takes for the sensor to respond to a changed.

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