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

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

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Automation System
Programmable controllers:

(a) and (c) above
cannot perform functions other than relay logic
are programmed using relay ladder logic
None of these
are widely used in many different industries

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Automation System
A solenoid:

can be used only in de circuits
is related to an aneroid
is widely used in industrial automation
is spring operated
None of these

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