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Total Questions : 3241 | Page 35 of 325 pages
Question 341. In case of constant underflow extraction operation, the __________ at all solute concentration.
  1.    Solids are drained to the same extent
  2.    Ratio of the insoluble to solution is constant
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 342. Binary distillation involves the mass transfer by __________ at the gas-liquid interface.
  1.    Unidirectional diffusion from liquid to gas phase
  2.    Unidirectional diffusion from gas to liquid phase
  3.    Either A or B
  4.    A counter diffusion at an almost equal molar rate
 Discuss Question
Answer: Option D. -> A counter diffusion at an almost equal molar rate
Question 343. The temperature of water cooled in cooling tower is always __________ temperature of entering air.
  1.    More than the wet bulb
  2.    Less than the wet bulb
  3.    Equal to the wet bulb
  4.    Equal to the dry bulb
 Discuss Question
Answer: Option A. -> More than the wet bulb
Question 344. A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.
  1.    10-15
  2.    30-40
  3.    70-80
  4.    90-100
 Discuss Question
Answer: Option A. -> 10-15
Question 345. Pick out the correct statement.
  1.    For identical gas flow rates, less pressure drop occurs through a plate tower than through a packed tower
  2.    Plate column can handle greater liquid loads without flooding than packed column, but the liquid hold up is more in the case of plate column
  3.    For the same duty, plate columns weigh less than packed columns
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 346. When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.
  1.    Always lower than
  2.    Always higher than
  3.    Same as
  4.    Dependent on the system; can be either lower or higher than
 Discuss Question
Answer: Option A. -> Always lower than
Question 347. __________ developed the film theory.
  1.    Higbie
  2.    Fick
  3.    Ergun
  4.    Levenspeil
 Discuss Question
Answer: Option A. -> Higbie
Question 348. Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.
  1.    100
  2.    50
  3.    78
  4.    None of these
 Discuss Question
Answer: Option A. -> 100
Question 349. On addition of solute in the solvent, the __________ of the solution decreases.
  1.    Boiling point
  2.    Freezing point
  3.    Vapour pressure
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 350. Dry bulb temperature of the gas is __________ the wet bulb temperature.
  1.    Less than
  2.    More than
  3.    Equal to
  4.    None of these
 Discuss Question
Answer: Option B. -> More than

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