Automation System
What is offset error?

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

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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
having each electron gun controlled by separate signal
None of these
grouping the phosphor dots in a circular pattern
having each electron gun controlled by a composite signal

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Automation System
Digital signals:

can have three possible levels
None of these
are assigned values of 1 or 0 depending on the voltage level
have a frequency measured in units of hertz
have a sinusoidal shape.

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