Chemical Engineering MCQs

Page No. 675

Can the efficiency of a plate in the distillation tower be greater than 100% ?


aYes


bNormally not; but is possible if infinite number of plates are put


cNever


dYes; if the reflux ratio is maximum


View Answer Never

Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in_________________?


aDecreased solute solubility


bLarge minimum liquid to gas (L/G) ratio


cLarge number of trays


dAll A., B. and C.


View Answer All A., B. and C.

Reverse osmosis is also called_________________?


aDialysis


bElectrodialysis


cDiffusion


dUltra-filtration


View Answer Ultra-filtration

Laboratory determination of the diffusivity of vapor is done by __________________ method?


aWetted wall column


bGilliland’s


cWinkelmann’s


dWike’s


View Answer Winkelmann’s

Paper industry employs _______________ driers?


aCylinder


bRotary


cSpray


dFluidised bed


View Answer Cylinder

Use of packed towers for distillation is generally limited to the____________________?


aSmall sizes


bMulti-component distillation


cHigh pressure operation


dVacuum distillation


View Answer Small sizes

_______________ extractor is used for the concentration of radioactive nuclear waste?


aPulsed column


bSieve plate


cMixer-settler


dBollman


View Answer Pulsed column

Removal of ______________ exemplifies an adsorption unit operation?


aUranium from its ore


bWater from petrol


cAmmonia from coke oven gas


dMustard oil from mustard seed


View Answer Water from petrol

The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an ___________________?


aPure component


bBinary mixture


cTernary mixture


dInsoluble binary system


View Answer Pure component

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the ________________ temperature?


aDry-bulb


bWet-bulb


cDew point


dAdiabatic saturation


View Answer Wet-bulb

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