Automation System
For a type 2 system, the steady-state:

None of these
error for a step input is always zero
input for acceleration input is always non-zero
All of these
error for a velocity input is always zero

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Automation System
Stepping motors:

do not require commutators
can run both clockwise and counterclockwise
All of these
can run at varying speeds
can be built to index different amounts by changing the pole configuration

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