Automation System
A solenoid:

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

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Automation System
The program execution time:

All of these
must be slower than the fastest mechanical operation that is to be controlled
None of these
will vary depending on the language used
cannot be changed once the program is written

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Automation System
A sequence controller:

is difficult to program
is no longer in widespread use
None of these
performs on/off control functions in relation to time.
is a mechanical only controller

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