Automation System
A stepping motor;

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

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Automation System
The use of specialized workstations:

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

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Automation System
Relay ladder logic is used in a PC because:

it is the best industrial control language ever developed.
it is impossible to write a control program for a machine in any other logic
All of these
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
None of these

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