Automation System
In the operation of a programmable controller:

any latched data must be done using an external latching relay
None of these
all of the logic status is maintained in memory
All of these
mathematics cannot be performed

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Automation System
A semi-continuous operation means:

None of these
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
the operation is continuous each shift, but stops between shifts
coffee breaks are allowed for the operator

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