Automation System
Pressure sensors:

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

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Automation System
A process controller:

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

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Automation System
A solenoid:

is related to an aneroid
None of these
can be used only in de circuits
is widely used in industrial automation
is spring operated

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Automation System
Trend analysis:

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

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