Chemical Engineering MCQs

Page No. 675

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


aYes

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

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cNever

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dYes; if the reflux ratio is maximum

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View Answer Never

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


aDecreased solute solubility

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bLarge minimum liquid to gas (L/G) ratio

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cLarge number of trays

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dAll A., B. and C.

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View Answer All A., B. and C.

Reverse osmosis is also called_________________?


aDialysis

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bElectrodialysis

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cDiffusion

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dUltra-filtration

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View Answer Ultra-filtration

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


aWetted wall column

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bGilliland’s

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cWinkelmann’s

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dWike’s

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View Answer Winkelmann’s

Paper industry employs _______________ driers?


aCylinder

✓


bRotary

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cSpray

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dFluidised bed

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View Answer Cylinder

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


aSmall sizes

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bMulti-component distillation

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cHigh pressure operation

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dVacuum distillation

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View Answer Small sizes

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


aPulsed column

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bSieve plate

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cMixer-settler

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dBollman

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View Answer Pulsed column

Removal of ______________ exemplifies an adsorption unit operation?


aUranium from its ore

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bWater from petrol

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cAmmonia from coke oven gas

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dMustard oil from mustard seed

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View Answer Water from petrol

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


aPure component

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bBinary mixture

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cTernary mixture

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dInsoluble binary system

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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

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bWet-bulb

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cDew point

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dAdiabatic saturation

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View Answer Wet-bulb

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