Automation System
An encoder:

converts a binary number to a decimal number.
None of these
is used to send telegraph signals
converts an input to a binary number
can have only four keys

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Automation System
If the transient response of a system is overdamped:

the value of the output never stabilizes.
All of these
the value of the output exceeds the value of the input at times during the transient period.
None of these
the value of the output never exceeds the value of the input during the transient period.

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