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Process Control and Instrumentation

Process Control and Instrumentation
Alphatron measures pressure __________ microns.

< 1
> 3
< 3
< 0.1

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Process Control and Instrumentation
In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.

None of these
Manipulated
Load
Controlled

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Process Control and Instrumentation
Continuous measurement of moisture content of paper in paper industry is done by measuring the

None of these
Magnetic susceptibility
Electrical resistance through the paper
Thermal conductivity through the paper

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Process Control and Instrumentation
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

Thermocouple
Bimetallic thermometer
Mercury thermometer
Radiation pyrometer

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

800-1600
400-1600
400-1000
800-2500

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Process Control and Instrumentation
Identify an unbounded input from inputs whose transfer functions are given below

1/(S² + 1)
1/S²
1/S
1

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