Automation System
A flip-flop:

remembers what was previously stored in it
(a) and (c)
is a combinational logic device
None of these
is a sequential logic device

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Automation System
A semi-continuous operation means:

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

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