Mass Transfer MCQs with answers Page - 19

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. Raschig ring made of porcelain cannot be used for treating concentrated

  • (A) Hydrochloric acid
  • (B) Nitric acid
  • (C) Alkalis
  • (D) Sulphuric acid

A

Admin • 833.24K Points
Coach

Q. At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

  • (A) 100
  • (B) zero
  • (C) 50
  • (D) Between 0 and 100

A

Admin • 833.24K Points
Coach

Q. Tower diameter may be decreased by

  • (A) Using higher reflux ratio
  • (B) Use of increased tray spacing
  • (C) Increasing the liquid flow rate
  • (D) Increasing the vapour flow rate

A

Admin • 833.24K Points
Coach

Q. The humid volume may be increased by increasing the

  • (A) Temperature at constant humidity
  • (B) Humidity at constant temperature
  • (C) Both (A) and (B)
  • (D) Neither (A) nor (B)

A

Admin • 833.24K Points
Coach

Q. Pick out the correct relationship. (Where, Ri = internal reflux ratio Ro = external reflux ratio.)

  • (A) (1 + Ro) = Ro/Ri
  • (B) (1 - Ro) = Ro/Ri
  • (C) (1 + Ri) = Ro/Ri
  • (D) (1 - Ri) = Ro/Ri

A

Admin • 833.24K Points
Coach

Q. Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the

  • (A) High evaporation losses of water
  • (B) High pressure drop of the gas
  • (C) Difficulty in its fabrication
  • (D) None of these

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)

A

Admin • 833.24K Points
Coach

Q. Which of the following has the same dimension as mass diffusivity?

  • (A) Momentum flux
  • (B) Kinematic viscosity
  • (C) Thermal diffusivity
  • (D) Both (B) and (C)

A

Admin • 833.24K Points
Coach

Q. Packed column distillation is limited to the column __________ metres.

  • (A) Height < 6
  • (B) Diameter < 0.6
  • (C) Both (A) & (B)
  • (D) Neither (A) nor (B)

A

Admin • 833.24K Points
Coach

Q. Which of the following decreases during evaporative cooling process with recirculated water supply?

  • (A) Wet bulb temperature
  • (B) Relative humidity
  • (C) Partial pressure of vapour
  • (D) None of these

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