Chemical Engineering MCQs

Page No. 402

A system with a double pole at the origin is unstable since the corresponding term in the time domain________________?


aIs a constant


bGrows exponentially with time


cGrows linearly with time


dDecays linearly with time



Gas chromatography is used for the measurement of ________________?


aTemperature


bPressure


cConcentration


dFlow rate


View Answer Concentration

Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?


aMaking the volume of thermometer bulb as large as conveniently possible


bReducing the volume of the capillary to a minimum


cReducing the volume of the receiving element to a minimum


dAll A , B & C.


View Answer All A , B & C.

Concentration of sugar solution can be determined by the__________________?


aPolarimetry


bFlame photometry


cEmission spectroscopy


dOscillometry


View Answer Polarimetry

A constant volume gas thermometer employing ______________ is used to measure sub-zero (i.e., < 0°C) temperature?


aHelium


bHydrogen


cNitrogen


dNone of these


View Answer Helium

Measurement of pressure in ammonia reactor is done by __________________?


aBourdon gauge


bU-tube manometer


cInclined tube manometer


dPirani gauge


View Answer Bourdon gauge

Composition of alloys can be determined by _________________?


aPolarograph


bChromatograph


cRefractometer


dNone of these


View Answer Polarograph

The inverse Laplace transform of the function f(S) = 1/S (1 + S) is_________________?


a1 + et


b1 – et


c1 + e-t


d1 – e-t


View Answer 1 – e-t

A sinusoidal variation in the input passing through a linear first order system _________________?


aBecomes more oscillatory (frequency increases)


bBecomes less oscillatory (frequency decreases)


cGets amplified (magnitude increases)


dGets attenuated (magnitude decreases)



A barometer measures the _____________ pressure?


aAbsolute


bGauge


cAbsolute as well as gauge


ddynamic


View Answer Absolute

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