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Process Control and Instrumentation

Process Control and Instrumentation
Working principle of disappearing filament type optical pyrometer is based on the

Wien's law
Kirchoff's law
Peltier effect
Seebeck effect

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

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

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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
Thermocouple
Vapor pressure thermometer

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Process Control and Instrumentation
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

Semi conductors
Insulators
Dielectrics
Conductors

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Process Control and Instrumentation
Presence of a small amount of water in the organic systems can be determined by the __________ method.

Dielectric constant end loss factor
Polarimetry
Emission spectroscopy
Electrical conductivity

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Process Control and Instrumentation
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Chromel-constantan
All of these
Platinum-platinum + rhodium
Iron-constantan

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