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

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

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Automation System
What is offset error?

All of these
the difference between the sensor input and the absolute sensed parameter.
the difference between the controller output and the setting of the manipulated variable.
the difference between the control setpoint value and the actual value.
None of these

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Automation System
A sequence controller:

performs on/off control functions in relation to time.
is difficult to program
None of these
is a mechanical only controller
is no longer in widespread use

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