Mass Transfer MCQs with answers Page - 16

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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Admin • 833.24K Points
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Q. Design calculation for multiple component distillation is done by

  • (A) Ponchon-Savarit method
  • (B) McCabe-Thiele method
  • (C) Enthalpy concentration method
  • (D) Tray to tray calculations

A

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Q. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

  • (A) Decreased solute solubility
  • (B) Large minimum liquid to gas (L/G) ratio
  • (C) Large number of trays
  • (D) All (A), (B) and (C)

A

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Q. The unit of volumetric diffusivity is

  • (A) cm2/sec
  • (B) cm/sec
  • (C) cm3/sec
  • (D) cm2/sec2

A

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Q. Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant

  • (A) Humidity
  • (B) Velocity
  • (C) Temperature
  • (D) All (A), (B) & (C)

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Q. The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

  • (A) D ∝ P 0.5
  • (B) D ∝ 1/P 0.5
  • (C) D ∝ 1/P
  • (D) D ∝ 1/P 1.5

A

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Q. In liquid extraction, if the selectivity is unity, then

  • (A) Separation of the constituents is the most effective
  • (B) No separation will occur
  • (C) Amount of solvent required will be minimum
  • (D) Solvent flow rate should be very low

A

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

  • (A) Yes
  • (B) Normally not; but is possible if infinite number of plates are put
  • (C) Never
  • (D) Yes; if the reflux ratio is maximum

A

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Q. H2S present in naphtha reformed gas is removed by absorbing with

  • (A) Ethanolamine
  • (B) K2CO3
  • (C) HCl
  • (D) Vacuum gas oil

A

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Q. Dorr thickener is an equipment used for

  • (A) Classification
  • (B) Sedimentation
  • (C) Clarification
  • (D) Leaching

A

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Q. With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent

  • (A) Increases
  • (B) Decreases
  • (C) Remain same
  • (D) Either (A) or (B), depends on the system

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