Mass Transfer MCQs with answers Page - 18

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. With increase in temperature, the rate of leaching increases, because the

  • (A) Diffusivity of solute increases
  • (B) Viscosity of solvent decreases
  • (C) Thermal conductivity of solute increases
  • (D) None of these

A

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Q. Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

  • (A) Less than
  • (B) More than
  • (C) Equal to
  • (D) Either (A) or (B); depends on the solid

A

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Q. The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is

  • (A) 2
  • (B) 0.5
  • (C) 50
  • (D) 150

A

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Q. Which of the following is not a batch drier?

  • (A) Truck drier
  • (B) Agitated pan drier
  • (C) Fluidised bed drier
  • (D) Vacuum shelf drier

A

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Q. Acetic acid will be most economically separated from a dilute solution of acetic acid in water by

  • (A) Solvent extraction
  • (B) Continuous distillation
  • (C) Evaporation
  • (D) Absorption

A

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Q. The main reason for dividing a tall packed tower into series of small towers is to

  • (A) Minimise the overall pressure drop
  • (B) Avoid flooding
  • (C) Reduce liquid hold up
  • (D) Avoid channelling

A

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Q. The most efficient cooling tower out of the following is

  • (A) Induced draft
  • (B) Forced draft
  • (C) Natural draft
  • (D) Atmospheric

A

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Q. Molecular distillation is

  • (A) High temperature distillation
  • (B) For heat-sensitive materials
  • (C) Very low pressure distillation
  • (D) Both (B) and (C)

A

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Q. All moisture in a non-hygroscopic material is the __________ moisture.

  • (A) Free
  • (B) Equilibrium
  • (C) Unbound
  • (D) Bound

A

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Q. Molecular diffusivity of a liquid

  • (A) Increases with temperature
  • (B) Decreases with temperature
  • (C) May increase or decrease with temperature
  • (D) Is independent of temperature

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