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Process Control and Instrumentation

Process Control and Instrumentation
On-off controllers are normally used for

Low loads
Temperature changes
Flow rate changes
None of these

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Process Control and Instrumentation
Which of the following is not a speed measuring instrument?

Stroboscope
Tachometer
Psychrometer
All of these

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Process Control and Instrumentation
Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a

Mercury in glass thermometer
Reistance thermometer
Vapor pressure thermometer
Thermocouple

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Process Control and Instrumentation
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.

Volumetric expansion
Increase of thermal conductivity
Increase of pressure
Differential linear expansion

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Process Control and Instrumentation
Which of the following is not a differential pressure flow meter?

Rotameter
Orificemeter
Flow nozzle
Venturimeter

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Process Control and Instrumentation
Mercury manometer (U-tube type) exemplifies a __________ order system.

Second
Zero
First
Third

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