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Total Questions : 3241 | Page 31 of 325 pages
Question 301. Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches.
  1.    5
  2.    30
  3.    60
  4.    100
 Discuss Question
Answer: Option B. -> 30
Question 302. Pick out the wrong statement.
  1.    Mass transfer co-efficient does not account for gase-liquid diffusion
  2.    Diffusion co-efficient and mass transfer co-efficient are not same in any mass transfer operation
  3.    Contacting cold vapor-gas mixture with hot liquid exemplifies humidification process
  4.    Contacting cold liquid with warm vapor-gas mixture exemplifies dehumidification process
 Discuss Question
Answer: Option A. -> Mass transfer co-efficient does not account for gase-liquid diffusion
Question 303. Large quantity of silica gel is normally dried in a __________ dryer.
  1.    Freeze
  2.    Through circulation
  3.    Rotary vacuum
  4.    Tray
 Discuss Question
Answer: Option B. -> Through circulation
Question 304. Adsorption is an unit operation which generally involves __________ systems.
  1.    Liquid-solid
  2.    Gas-solid
  3.    Fluid-solid
  4.    Solid-solid
 Discuss Question
Answer: Option C. -> Fluid-solid
Question 305. Refractory bricks are usually dried in a __________ dryer.
  1.    Tray
  2.    Tunnel
  3.    Conveyor
  4.    Festoon
 Discuss Question
Answer: Option B. -> Tunnel
Question 306. For absorbing a sparingly soluble gas in a liquid, the
  1.    Gas side co-efficient should be increased
  2.    Liquid side coefficient should be increased
  3.    Gas side co-efficient should be decreased
  4.    Liquid side co-efficient should be decreased
 Discuss Question
Answer: Option B. -> Liquid side coefficient should be increased
Question 307. Critical humidity of a solid salt means the humidity
  1.    Above which it will always become damp
  2.    Below which it will always stay dry
  3.    Both A and B
  4.    Above Which it will always become dry and below which it will always stay damp
 Discuss Question
Answer: Option C. -> Both A and B
Question 308. The process employing desorption of the absorbed solute by a solvent is called
  1.    Elution
  2.    Osmosis
  3.    Reverse osmosis
  4.    Sublimation
 Discuss Question
Answer: Option A. -> Elution
Question 309. Degree of freedom for leaching and solvent extraction process is
  1.    1
  2.    3
  3.    0
  4.    2
 Discuss Question
Answer: Option B. -> 3
Question 310. The reciprocal of stripping factor is termed as
  1.    Selectivity index
  2.    Relative volatility
  3.    Absorption factor
  4.    Murphree efficiency
 Discuss Question
Answer: Option C. -> Absorption factor

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