Automation System
A solenoid:

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

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Automation System
Relay ladder logic is used in a PC because:

most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
it is the best industrial control language ever developed.
it is impossible to write a control program for a machine in any other logic
None of these
All of these

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