Automation System
A semi-continuous operation means:

a computer is a required part of the machine
coffee breaks are allowed for the operator
None of these
the operation is continuous each shift, but stops between shifts
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.

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Automation System
A stepping motor;

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

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