Automation System
The two types of relays in a PC are:

None of these
an output relay and a control relay
a retentive relay and a non-retentive relay
a control relay and a retentive relay
All of these

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Automation System
If the transient response is under damped:

the present overshoot is zero
both a and b
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
None of these

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Automation System
A stepping motor;

can index positional movement.
has a commutator
None of these
is a good choice where continuous rotation is needed
has a speed proportional to voltage input

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