Automation System
A solenoid:

is widely used in industrial automation
None of these
is related to an aneroid
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:

it is impossible to write a control program for a machine in any other logic
All of these
None of these
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.

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Automation System
A flip-flop:

(a) and (c)
is a sequential logic device
None of these
is a combinational logic device
remembers what was previously stored in it

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Automation System
Semiconductor devices:

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

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Automation System
If the transient response is under damped:

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

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