Automation System
A stepping motor;

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

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

University of Aston, Birmingham, 1960
Massachusetts Institute of Technology in 1963
None of these
Cranfield Institute of Technology, London, 1962
Imperial college of Science and Technology, London, 1973

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Automation System
A continuous process is:

used only for simple tasks
self-contained in that raw materials enter the process and an identifiable products exits the process.
one that never shuts down
used only with analog controllers.
None of these

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