Chemical Engineering MCQs

Page No. 642

Which of the following mixtures does not form an azeotrope at atmospheric pressure ?


aWater-alcohol


bMethyl alcohol-acetone


cButyl acetate-water


dNone of these


View Answer None of these

‘Absorption with chemical reaction’ is involved in the removal of__________________?


aCarbon dioxide from gaseous stream using alkaline solution


bBenzol from coke oven gas using solar oil/wash oil


cAmmonia from coke oven gas using refrigerated water


dTar from coke oven gas in primary gas coolers using chilled water



Which of these columns incurs the lowest pressure drop ?


aPacked column (with stacked packing)


bPacked column (with dumped packing)


cBubble plate column


dPulse column



Extraction of penicillin employs a ________________ extraction column?


aCentrifugal


bPacked


cPlate


dNone of these


View Answer Centrifugal

When adsorption hysteresis is observed, the desorption equilibrium pressure is _________________ that obtained by adsorption?


aAlways lower than


bAlways higher than


cSame as


dDependent on the system; can be either lower or higher than


View Answer Always lower than

On addition of solute in the solvent, the ______________ of the solution decreases ?


aBoiling point


bFreezing point


cVapour pressure


dBoth B. and C.


View Answer Both B. and C.

______________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids ?


aWetted wall


bPacked


cPlate


dSpray


View Answer Plate

Which of the following equipments is not used for gas dispersion ?


aAgitated vessels


bBubble cap tray towers


cPerforated sieve tray towers


dSpray towers


View Answer Spray towers

If xD = overhead product molal composition and RD = reflux ratio, then slope and intercept of the operating line for rectifying section are respectively ?


a[xD/(RD + 1)], [RD/(RD + 1)]


b[RD/(RD + 1)], [xD/(xD + 1)]


c[xD/(RD + 1)], [(RD + 1)/RD]


dNone of these



Hydrogenation of oil is carried out in a/an _______________ in Vanaspati manufacturing plant?


aAgitated vessel


bSieve tray column


cBubble cap column


dPacked tower


View Answer Agitated vessel

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