Automation System
One advantage of a PC in industrial control is that it:

None of these
All of these
has a reliable long life compared to relay logic
is unreliable because there are no moving parts
is very difficult for the inexperienced programmer to understand

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Automation System
If the transient response is under damped:

None of these
the present overshoot is zero
steady-state will be reached faster than if the system is overdamped
the value of the output will exceed the value of the input at times during the transient period
both a and b

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Automation System
Numerical control:

is a method for producing an exact number of parts per hour
None of these
is a method for controlling the operation of a machine by means of a set of instructions
applies only to milling machines
All of these

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