Chemical Engineering MCQs

Page No. 643

Fenske equation determines the __________________?


aMaximum number of ideal plates


bHeight of the distillation column


cMinimum number of theoretical plates


dOptimum reflux ratio



Schmidt number is given by ___________________?


aμ/ρDAB


bRe × Pe


cSh × Pe


dRe/Pe


View Answer μ/ρDAB

_______________ developed the film theory ?


aHigbie


bFick


cErgun


dLevenspiel


View Answer Higbie

Stacked packing compared to dumped packing_________________?


aProvides poorer contact between the fluids


bGives lower pressure drop


cBoth A. and B.


dGives higher pressure drop


View Answer Both A. and B.

A packed tower compared to a plate tower for a particular mass transfer operation__________________?


aIncurs smaller pressure drop


bAllows installation of cooling coils


cIs less costly when built in large sizes/diameters


dIs more suitable, if suspended solids are present in fluid streams



Raoult’s law applies to the___________________?


aAll liquid solutions


bNon-ideal solution only


cNon-volatile solute


dSolvents


View Answer Solvents

Which of the following is an undesirable property for an absorbing solvent ?


aLow vapour pressure


bLow velocity


cLow freezing point


dNone of these


View Answer None of these

Langmuir equation is associated with________________________?


aLeaching


bAdsorption


cSteam distillation


dMulti-component absorption


View Answer Adsorption

Radioactive nuclear waste is treated in____________________?


aMixer-settler extractor


bRotating-disc contactor


cPulsed column extractor


dBollman extractor



In case of an absorber, the operating _______________?


aLine always lies above the equilibrium curve


bLine always lies below the equilibrium curve


cLine can be either above or below the equilibrium curve


dVelocity is more than the loading velocity



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