Automation System
An encoder:

None of these
converts an input to a binary number
can have only four keys
converts a binary number to a decimal number.
is used to send telegraph signals

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Automation System
A semi-continuous operation means:

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

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

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

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