Automation System
For a type 0 system, the steady-state:

input for acceleration input is always non-zero
None of these
error for a velocity input is always zero
(a) and (c)
error for a step input is always zero

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Automation System
An encoder:

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

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