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Process Control and Instrumentation

Process Control and Instrumentation
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

CO₂
O₂
CO
N₂

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

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

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Process Control and Instrumentation
Dead zone is the

Same as time constant
Same as transportation lag
None of these
Maximum change in the variable that does not change the reading of the instrument

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Process Control and Instrumentation
Which of the following is not a variable area flow meter?

Orifice and tapered plug meter
Piston type meter
Magnetic flow meter
Rotameter

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Process Control and Instrumentation
Flow rate of sludge is not measured by a/an

Both B & C
Kennison nozzle
Orificemeter
Open weir

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Process Control and Instrumentation
An aneroid barometer measures the __________ pressure.

Atmospheric
Vacuum
Gage
Absolute

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