Chemical Engineering MCQs

Page No. 151

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?


aH


b12.6 H


c13.6 H


d14.6 H


View Answer 12.6 H

Gases are cooled in Joule-Thomson expansion, when it is _____________ inversion temperature?


aBelow


bAt


cAbove


dEither B. or C.


View Answer Below

Which of the following produces maximum pressure difference for transportation of gases ?


aVacuum pumps


bBlowers


cFans


dCompressors


View Answer Compressors

Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as________________?


aP + F – C = 2


bC = P – F + 2


c F = C – P – 2


dP = F – C – 2


View Answer P + F – C = 2

Bernoulli’s equation is dependent on the__________________?


aFirst law of thermodynamics


bThird law of thermodynamics


cLaw of conservation of momentum


dNone of these


View Answer None of these

Entropy change in case of reversible adiabatic process is________________?


aMinimum


b Zero


cMaximum


dIndeterminate


View Answer Zero

For the production of very high vacuum, a _____________ pump is normally used?


aDiffusion


bCentrifugal


cJet ejector


dPiston


View Answer Diffusion

Foot valve provided in the pump is a ______________ valve?


aDirection control


bBack pressure


cRelief


dPressure reduction


View Answer Back pressure

Fundamental principle of refrigeration is based on the ______________ law of thermodynamics?


aZeroth


bFirst


c Second


dThird


View Answer Second

For a constant volume process_________________?


adE = CpdT


bdE = CvdT


cdQ = dE + pdV


ddW = pdV


View Answer dE = CvdT

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