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MCQs

Total Questions : 3241 | Page 10 of 325 pages
Question 91. Flooding in a distillation column is detected by a sharp
  1.    Increase in Murphree plate efficiency
  2.    Decrease in pressure drop
  3.    Decrease in liquid hold up in the coloumn
  4.    Increase in pressure drop
 Discuss Question
Answer: Option D. -> Increase in pressure drop
Question 92. With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop
  1.    Decreases
  2.    Remains unchanged
  3.    Increases
  4.    Decreases exponentially
 Discuss Question
Answer: Option C. -> Increases
Question 93. Which of the following is directly concerned with psychrometry?
  1.    Lewis reltionship
  2.    Galileo number
  3.    Weber number
  4.    Dean number
 Discuss Question
Answer: Option A. -> Lewis reltionship
Question 94. The 'shanks system' of leaching (i.e., counter-current multiple contact leaching) is used for
  1.    Recovery of tannis from the tree barks and woods
  2.    Leaching sodium nitrate from Chilean nitrate bearing rock
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 95. Which is not concerned directly with mass transfer?
  1.    Schmidt number
  2.    Sherwood number
  3.    Lewis relationship
  4.    Froude number
 Discuss Question
Answer: Option D. -> Froude number
Question 96. Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
  1.    Surface renewal
  2.    Film
  3.    Penetration
  4.    None of these
 Discuss Question
Answer: Option B. -> Film
Question 97. One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect
  1.    The product composition but not the fraction vaporised
  2.    The product composition as well as the fraction vaporised
  3.    The fraction vaporised but not the product composition
  4.    Neither the product composition nor the fraction vaporised
 Discuss Question
Answer: Option C. -> The fraction vaporised but not the product composition
Question 98. Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular difusion, if
  1.    Mass transfer is accompanied by reaction
  2.    Diffusion of A is in stagnant medium B
  3.    Molecular mean free path is high
  4.    There is equimolar counter diffusion
 Discuss Question
Answer: Option D. -> There is equimolar counter diffusion
Question 99. The recovery of pencillin from the acidified fermentation broth is done by
  1.    Distillation
  2.    Evaporation
  3.    Absorption
  4.    Liquid extraction
 Discuss Question
Answer: Option D. -> Liquid extraction
Question 100. Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be
  1.    1
  2.    > 1
  3.    < 1
  4.    ≤ 1
 Discuss Question
Answer: Option B. -> > 1

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