Automation System
A semi-continuous operation means:

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
None of these
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.

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Automation System
Semiconductor devices:

usually have a very short MTBF (mean time between failure)
have a very short infant mortality period
All of these
None of these
are less reliable than electro¬mechanical components

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