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Process Control and Instrumentation

Process Control and Instrumentation
Pirani gauge is used for the measurement of

Liquid level under pressure
High vacuum
Very high pressure
Liquid level at atmospheric pressure

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Process Control and Instrumentation
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

Speed of response
Accuracy (± 1% of span)
All of these
Temperature measuring range (- 40°C to 450°C)

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Process Control and Instrumentation
Composition of alloys can be determined by

None of these
Chromatograph
Refractrometer
Polarograph

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Process Control and Instrumentation
Process degree of freedom indicates __________ number of controllers to be used.

The minimum
Both maximum and the minimum
Nothing about the
The maximum

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Process Control and Instrumentation
Liquid flow rate in a small channel is best measured by a/an

Weir
Vane meter
Pitot tube
Venturimeter

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Process Control and Instrumentation
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

Low thermal conductivity
Low electrical conductivity
Low flash point
High viscosity index

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