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Process Control and Instrumentation

Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

20
50
30
40

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Process Control and Instrumentation
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

1
∞
-1

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Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Chromel
Brass
Invar
Nickel

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Process Control and Instrumentation
Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a

Dilatometer
Bimetallic thermometer
Mercury thermometer
Beckman thermometer

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Process Control and Instrumentation
A barometer measures the __________ pressure.

Dynamic
Absolute
Gauge
Absolute as well as gauge

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Process Control and Instrumentation
Measurement of sub-zero Celcius temperature in industry is done most commonly by

Bi-metallic thermometers
Gas thermometers
Thermocouples
Resistance thermometers

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