Mass Transfer MCQs with answers Page - 2

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. Which of the following binary systems is an example of a maximum boiling azeotrope?

  • (A) Water-hydrochloric acid
  • (B) Acetone-carbon disulphide
  • (C) Water-ethyl alcohol
  • (D) N-heptane-n-octane

A

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Q. Capacity of a rotary dryer depends on its

  • (A) R.p.m
  • (B) Inclination with ground surface
  • (C) Both A & B
  • (D) Neither A nor B

A

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Q. In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.

  • (A) The entire amount of C is transferred to solvent B
  • (B) Less than 2 kg but more than 1 kg of C is transferred to solvent B
  • (C) Less than 1 kg of C is transferred to B
  • (D) No amount of C is tranferred to B

A

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Q. Removal of __________ exemplifies an adsorption unit operation.

  • (A) Uranium from its ore
  • (B) Water from petrol
  • (C) Ammonia from coke oven gas
  • (D) Mustard oil from mustard seed

A

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Q. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.

  • (A) Sherwood number in mass transfer is analogous to Nusselt number in heat transfer
  • (B) Prandtl number in heat transfer is analogous to Schmidt number in mass transfer
  • (C) Reynolds number in mass transfer is analogous to Grashoff number in heat transfer
  • (D) Reynolds number remains the same in both heat and mass transfer

A

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Q. __________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid.

  • (A) Dew point
  • (B) Bubble point
  • (C) Dry bulb temperature
  • (D) Wet bulb temperature

A

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Q. Advantage of continuous drying over batch drying is that the

  • (A) Drying cost per unit weight of dried product is less
  • (B) Product with more uniform moisture content is produced
  • (C) Equipment size required is smaller
  • (D) All of the above

A

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Q. Channelling in a packed tower results from the

  • (A) High pressure drop
  • (B) Maldistribution of liquid
  • (C) Non-uniformity of packing
  • (D) Both B and C

A

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Q. Pick out the wrong statement. Generally for physical adsorption, a gas of

  • (A) Higher molecular weight is adsorbed in preference to a gas of low molecular weight
  • (B) High critical temperature is adsorbed in preference to a gas of low critical temperature
  • (C) Low volatility is adsorbed in preference to a gas of high volatility
  • (D) None of these

A

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Q. Dew point of a gas-vapour mixture

  • (A) Increases with increase in pressure
  • (B) Decreases with decrease in pressure
  • (C) Decreases with temperature rise
  • (D) Increases with temperature rise

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