Automation System
A process controller:

None of these
All of these
can interface to digital and analog I/O
is useful in a continuous process control application
can solve a PID process control equation easily

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Automation System
Today, programmable controllers:

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

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Automation System
A dc servo motor:

can provide precise position control
None of these
All of these
uses a tachometer for speed feedback
uses a variable dc voltage for speed control

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