Mass Transfer MCQs with answers Page - 12

Here, you will find a collection of MCQ questions on Mass Transfer. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

  • (A) Unidirectional diffusion from liquid to gas phase
  • (B) Unidirectional diffusion from gas to liquid phase
  • (C) A counter diffusion at an almost equal molar rate
  • (D) Either A or B

A

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Q. A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

  • (A) 10-15
  • (B) 30-40
  • (C) 70-80
  • (D) 90-100

A

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Q. The temperature of water cooled in cooling tower is always __________ temperature of entering air.

  • (A) More than the wet bulb
  • (B) Less than the wet bulb
  • (C) Equal to the wet bulb
  • (D) Equal to the dry bulb

A

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Q. When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

  • (A) Always higher than
  • (B) Always lower than
  • (C) Same as
  • (D) Dependent on the system; can be either lower or higher than

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Q. Pick out the correct statement.

  • (A) For identical gas flow rates, less pressure drop occurs through a plate tower than through a packed tower
  • (B) Plate column can handle greater liquid loads without flooding than packed column, but the liquid hold up is more in the case of plate column
  • (C) For the same duty, plate columns weigh less than packed columns
  • (D) All of the above

A

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Q. The minimum liquid rate to be used in an absorber corresponds to an operating line

  • (A) Of slope = 1
  • (B) Of slope = 0.1
  • (C) Tangential to the equilibrium curve
  • (D) None of these

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Q. Leaching of uranium ore and gold ore is done in

  • (A) Centrifugal extractor
  • (B) Pachuca tanks
  • (C) Bollman extractor
  • (D) None of these

A

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Q. The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

  • (A) 0
  • (B) ∞
  • (C) -ve
  • (D) +ve

A

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Q. For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates.

  • (A) Binary mixture is represented by the apex
  • (B) Binary mixture is represented by any point inside
  • (C) Ternary mixture is represented by the sides
  • (D) Pure component is represented by the apex

A

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Q. In a gas-liquid absorption column, for obtaining the maximum absorption efficiency

  • (A) Liquid stream should be distributed uniformly
  • (B) Gas stream should be distributed uniformly
  • (C) Both gas as well as liquid streams should be distributed uniformly
  • (D) By passing should be completely avoided

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