Chemical Engineering MCQs

6108 MCQs (Page 215 of 611)

Attempt Chemical Engineering Quiz

The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?

A. L/mg
B. G/ml
C. Ml/g
D. Lg/m

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Chemisorption (chemical adsorption) is_______________________?

A. Same as “van der waals” adsorption
B. Characterised by adsorption of heat
C. An irreversible phenomenon
D. A reversible phenomenon

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A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around _______________ °C?

A. 21.7
B. 20
C. 27.3
D. 18.7

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Inside the distillation column, the________________________?

A. Driving force for the vapour flow is the pressure drop
B. Liquids are not always at their bubble points
C. Pressure increases gradually from bottom to the top of the column
D. None of these

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Dry bulb temperature of unsaturated air is more than its ________________ temperature?

A. Dew point
B. Wet bulb
C. Both a & b
D. Neither a nor b

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Boiling point diagram is not affected by the ambient______________________?

A. Pressure
B. Humidity
C. Temperature
D. Both b. and c.

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Total reflux in a distillation operation requires minimum____________________?

A. Reboiler load
B. Number of plates
C. Condenser load
D. All a., b. and c.

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Inside the distillation columns, the ________________________?

A. Highest temperatures is near the feed plate
B. Driving force for the liquid flow is its weight
C. Vapors are not always at their dew points
D. All a., b. and c.

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An Azeotropic mixture is a ________________ mixture?

A. Binary
B. Ternary
C. Constant boiling point
D. None of these

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The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or “outgassed” adsorbent to from a definite concentration of adsorbate is called its_____________________?

A. Integral heat of adsorption
B. Heat of wetting
C. Differential heat of adsorption
D. Heat of normal condensation

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