Mass Transfer MCQs with answers Page - 3

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 • 802.91K Points
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Q. Co-current absorbers are usually used when the gas to be dissolved in the liquid is

  • (A) A mixture
  • (B) A pure substance
  • (C) Highly soluble
  • (D) Sparingly soluble

A

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Q. The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by

  • (A) Increasing the gas film co-efficient
  • (B) Increasing the liquid film co-efficient
  • (C) Increasing the total pressure
  • (D) Decreasing the total pressure

A

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Q. The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is

  • (A) 2.09 × 10-4
  • (B) 2.09 × 10-5
  • (C) 2.09 × 10-9
  • (D) 2.09 × 10-12

A

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Q. The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture.

  • (A) Reducing the total pressure
  • (B) Increasing the total pressure
  • (C) Reducing the temperature
  • (D) Both B and C

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. Dew point of an air-water vapor mixture

  • (A) Decreases with decrease in pressure
  • (B) At constant humidity & total pressure is fixed
  • (C) Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve
  • (D) All of the above

A

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Q. __________ extractor is used for the concentration of radioactive nuclear waste.

  • (A) Seive plate
  • (B) Pulsed column
  • (C) Mixer-settler
  • (D) Ballman

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Q. Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

  • (A) Electrical resistance
  • (B) Thermal conductivity
  • (C) Strength
  • (D) None of these

A

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Q. Overall efficiency of the distillation column is

  • (A) Always more than the point efficiency
  • (B) Same as the Murphree efficiency
  • (C) The ratio of number of ideal plates to actual plates
  • (D) The ratio of number of actual plates to ideal plates

A

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Q. Powdery materials can be guarded against caking tendency on storage by

  • (A) Providing irregular grain size
  • (B) Providing minimum percentage of voids
  • (C) Having maximum possible points of contact
  • (D) None of these

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