Automation System
A semi-continuous operation means:

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

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Automation System
In raster-scan colour monitors, colour can be intensified by:

having each electron gun controlled by separate signal
None of these
using an in-line gun arrangement with a solid metal mesh
grouping the phosphor dots in a circular pattern
having each electron gun controlled by a composite signal

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