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

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

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Automation System
A stepping motor;

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

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Automation System
Digital signals:

are assigned values of 1 or 0 depending on the voltage level
have a frequency measured in units of hertz
have a sinusoidal shape.
None of these
can have three possible levels

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