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Process Control and Instrumentation

Process Control and Instrumentation
Working principle of mercury in glass thermometer is

None of these
Volumetric expansion
Linear expansion
Pressure rise with temperature

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Process Control and Instrumentation
Use of I-control along with P-control facilitates

None of these
Elimination of offset
Reduction of stability time
Reduction of offset

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Process Control and Instrumentation
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)

nRT/P
p/nRT
V/nRT
nRT/V

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Process Control and Instrumentation
Polarograph is meant for the analysis of

Miscible liquids
Solids
Isotopes
Gaseous mixture

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Process Control and Instrumentation
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

Thomson effect
Seebeck effect
Peltier effect
Joule heating effect

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Process Control and Instrumentation
Which of the following fluid flow measuring devices can measure the largest flow rate?

Weir
Orificemeter
V-notch
Rotameter

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