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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?

CO
O₂
N₂
CO₂

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Process Control and Instrumentation
Liquid discharge from a tank or reservoir can not be measured by

Orificemeters
Notches
Mouthpieces
Weirs

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

1
43838
-1
44020

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Process Control and Instrumentation
Continuous measurement of moisture content of paper in paper industry is done by measuring the

Electrical resistance through the paper
Magnetic susceptibility
Thermal conductivity through the paper
None of these

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Millivolts
Volts
Kilo volts
Microvolts

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Process Control and Instrumentation
Thermal conductivity measurement is used for the determination of

Composition of an alloy
Specific gravity of petrofuels
O₂ percentage in the flue gas
CO₂ percentage in the flue gas

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