Automation System
A dc servo motor:

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

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Automation System
An aneroid barometer

None of these
measures pressure by sensing deflection of an evacuated chambers.
can measure only atmospheric pressure
is very unreliable
can be used to measure gas or liquid flow rates

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Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

None of these
run regular simulated tests using TARP (testing of Applications Recovery Planes)
do not allow unbonded service people to work on your equipment
Verify the reputation of the people installing your system
do not leave training manuals unsecured

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