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

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

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Automation System
Programmable controllers:

(a) and (c) above
None of these
cannot perform functions other than relay logic
are widely used in many different industries
are programmed using relay ladder logic

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Automation System
The use of specialized workstations:

None of these
reduces the host computer workload
has a high cost-performance tradeoff
reduces the host computer workload and allows more users
provides limited growth potentials for 3-D

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