Automation System
Compared to an open-loop system, a closed-loop control system is:

None of these
more complex
All of these
more stable
more accurate

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Automation System
An operating system:

All of these
can help reduce software development time
provides ability for other programmers to understand the software structure
None of these
is useless in most control applications

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Automation System
Stepping motors:

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

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