Automation System
Trend analysis:

is a brand new concept
is used only in financial planning
requires a very expensive system to implement
can improve control system response
None of these

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Automation System
A process controller:

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

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Automation System
Pressure sensors:

All of these
None of these
use capacitive variations to sense pressure
use an aneroid chamber with a variable resistance output
use the piezoresistive effect in strain gauge sensors

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