Mass Transfer MCQs with answers Page - 13

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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A

Admin • 833.24K Points
Coach

Q. To get high tray efficiency

  • (A) Interfacial surface between liquid and gas phase should be large
  • (B) Time of contact between the two phases should be less
  • (C) Gas velocity should be very low
  • (D) Liquid entrainment should be severe

A

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Q. Lewis number (Le) is

  • (A) Sc × Pr
  • (B) Pr × St
  • (C) Sh × Pr
  • (D) St × Sh

A

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Q. Which is not concerned directly with mass transfer?

  • (A) Schmidt number
  • (B) Sherwood number
  • (C) Lewis relationship
  • (D) Froude number

A

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Q. Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

  • (A) Size
  • (B) Durability
  • (C) Porosity
  • (D) Cost

A

Admin • 833.24K Points
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Q. For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

  • (A) No change in theoretical
  • (B) Marginal decrease in the number of
  • (C) Major decrease in the number of
  • (D) None of these

A

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Q. Experimental determination of __________ is done by wetted wall column method.

  • (A) Diffusion co-efficient
  • (B) Mass transfer co-efficient
  • (C) NTU
  • (D) None of these

A

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Q. Ammonia present in the coke oven gas is removed by washing with

  • (A) Caustic solution
  • (B) Dilute ammoniacal liquor
  • (C) Dilute HCl
  • (D) Ethanolamine

A

Admin • 833.24K Points
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Q. Which of the following provides maximum contact surface for a liquid-vapour system?

  • (A) Packed tower
  • (B) Bubble-cap plate column
  • (C) Sieve-plate column
  • (D) Wetted wall column

A

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Q. At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

  • (A) 1
  • (B) 0
  • (C) ∞
  • (D) None of these

A

Admin • 833.24K Points
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Q. Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ column.

  • (A) Spray
  • (B) Packed
  • (C) Bubble cap plate
  • (D) Wetted wall