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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
Radiation thermometer can not measure the temperature

Of an object without coming in contact with it
Of moving objects at high temperature
Inside a pressure vessel
Of liquid oxygen

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Process Control and Instrumentation
Emission spectroscopy is used for

Solids and metal analysis
Determination of CO₂ in gases
NOxdetermination
Determining water purity

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Process Control and Instrumentation
Which of the following thermocouple materials does not contain nickel?

None of these
Chromel
Constantan
Alumel

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Process Control and Instrumentation
Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.

100
87.5
63.2
95

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Process Control and Instrumentation
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in

Flux density
Light intensity
Current
Voltage

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