Automation System
The APT (automatically progra-mmed tools) language is used with:

None of these
programmable controllers
drafting systems
large automation systems
numerical controlled machines.

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Automation System
A semi-continuous operation means:

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

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Automation System
Light sensors:

come in a wide variety of mounting styles
work in direct sunlight
never use infrared light as light source
cannot be used a s limit switches.
None of these

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