Automation System
A solenoid:

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

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Automation System
Digital signals:

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

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Automation System
Speech recognition:

All of these
None of these
will be used in more applications as the technology matures.
is already widely used in industrial controls
will never be used in industrial controls

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Automation System
What is offset error?

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

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