Mass Transfer MCQs with answers Page - 11

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A

Admin • 833.24K Points
Coach

Q. At a fixed total pressure, humidity depends only on the

  • (A) Partial pressure of vapour in the mixture
  • (B) Heat capacity of the vapour
  • (C) Density of the vapour
  • (D) None of these

A

Admin • 833.24K Points
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Q. Which of the following is not fixed by the process requirements, in the design of absorbers?

  • (A) Flow rate of the entering gas
  • (B) Composition of the entering liquid
  • (C) Terminal concentrations of gas stream
  • (D) None of these

A

Admin • 833.24K Points
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Q. __________ developed the film theory.

  • (A) Higbie
  • (B) Fick
  • (C) Ergun
  • (D) Levenspeil

A

Admin • 833.24K Points
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Q. On addition of solute in the solvent, the __________ of the solution decreases.

  • (A) Boiling point
  • (B) Freezing point
  • (C) Vapour pressure
  • (D) Both B and C

A

Admin • 833.24K Points
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Q. Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

  • (A) 50
  • (B) 78
  • (C) 100
  • (D) None of these

A

Admin • 833.24K Points
Coach

Q. At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.

  • (A) Is greater than
  • (B) Is lower than
  • (C) Is same as
  • (D) Cannot be predicted as data are insufficient

A

Admin • 833.24K Points
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Q. Dry bulb temperature of the gas is __________ the wet bulb temperature.

  • (A) Less than
  • (B) More than
  • (C) Equal to
  • (D) None of these

A

Admin • 833.24K Points
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Q. HETP is numerically equal to HTU, only when the operating line

  • (A) Lies below the equilibrium line
  • (B) Lies above the equilibrium line
  • (C) And equilibrium lines are parallel
  • (D) Is far from the equilibrium line

A

Admin • 833.24K Points
Coach

Q. If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

  • (A) 0.31
  • (B) 0.107
  • (C) 0.017
  • (D) 0.215

A

Admin • 833.24K Points
Coach

Q. In case of constant underflow extraction operation, the __________ at all solute concentration.

  • (A) Solids are drained to the same extent
  • (B) Ratio of the insoluble to solution is constant
  • (C) Both A & B
  • (D) Neither A nor B

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