Automation System
A solenoid:

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

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Automation System
Semiconductor devices:

are less reliable than electro¬mechanical components
None of these
have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
All of these

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Automation System
Most industrial control applications:

can be solved using more than one method of control
None of these
can be done more reliably using solid-state methods
All of these
must have the process specified correctly to be successful

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