Automation System
For a type 1 system, the steady-state:

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

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Automation System
Direct Numerical Control means:

complete elimination of a need for a human operator.
eliminating computers from the manufacturing process
using several computers to control one large machine
using one computer to control several machines
None of these

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