Automation System
A dc servo motor:

All of these
uses a tachometer for speed feedback
uses a variable dc voltage for speed control
None of these
can provide precise position control

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Automation System
What is the process lag?

The time it takes for the mass of the process to respond to an input change.
All of these
None of these
The time it takes for the sensor to respond to a changed.
The lag in the error signal when the setpoint is changed.

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Automation System
Pressure sensors:

use capacitive variations to sense pressure
None of these
use an aneroid chamber with a variable resistance output
use the piezoresistive effect in strain gauge sensors
All of these

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Automation System
Speech recognition:

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

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