Automation System
A semi-continuous operation means:

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.
a computer is a required part of the machine
coffee breaks are allowed for the operator

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Automation System
Numerical control:

is a method for producing an exact number of parts per hour
is a method for controlling the operation of a machine by means of a set of instructions
applies only to milling machines
All of these
None of these

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Automation System
The robot:

represents the most powerful new industrial automation tool currently on the horizon
None of these
will be more useful when robot vision is improved significantly
is very primitive at the present
All of these

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