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

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bGrows exponentially with time

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cGrows linearly with time

✓


dDecays linearly with time

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Gas chromatography is used for the measurement of ________________?


aTemperature

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bPressure

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cConcentration

✓


dFlow rate

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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

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bReducing the volume of the capillary to a minimum

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cReducing the volume of the receiving element to a minimum

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dAll A , B & C.

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View Answer All A , B & C.

Concentration of sugar solution can be determined by the__________________?


aPolarimetry

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bFlame photometry

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cEmission spectroscopy

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dOscillometry

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View Answer Polarimetry

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


aHelium

✓


bHydrogen

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cNitrogen

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dNone of these

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View Answer Helium

Measurement of pressure in ammonia reactor is done by __________________?


aBourdon gauge

✓


bU-tube manometer

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cInclined tube manometer

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dPirani gauge

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View Answer Bourdon gauge

Composition of alloys can be determined by _________________?


aPolarograph

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bChromatograph

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cRefractometer

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dNone of these

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View Answer Polarograph

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


a1 + et

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b1 – et

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c1 + e-t

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d1 – e-t

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View Answer 1 – e-t

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


aBecomes more oscillatory (frequency increases)

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bBecomes less oscillatory (frequency decreases)

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cGets amplified (magnitude increases)

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dGets attenuated (magnitude decreases)

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A barometer measures the _____________ pressure?


aAbsolute

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bGauge

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cAbsolute as well as gauge

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ddynamic

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View Answer Absolute

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