Automation System
A smart solid-state sensor is:

one that integrates both logic and a solid-state sensor into one unit.
None of these
All of these
not available today
one that has two or three substrates

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Automation System
A process controller:

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

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

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

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