Automation System
A Hall effect switch is usually used to:

sense a vacuum
None of these
measure temperature
sense the presence of a magnetic object.
measure voltage

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Automation System
If the transient response of a system is overdamped:

the value of the output exceeds the value of the input at times during the transient period.
the value of the output never stabilizes.
the value of the output never exceeds the value of the input during the transient period.
None of these
All of these

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Automation System
Semiconductor devices:

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

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