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MCQs

Total Questions : 143 | Page 6 of 15 pages
Question 51. Express the flash vaporization
  1.    Single stage operation
  2.    Multi component operation
  3.    Still operation
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Single stage operation
Answer: (a).Single stage operation
Question 52. The column used for differential distillation is_______________
  1.    Still
  2.    Differential column
  3.    Batch column
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Still
Answer: (a).Still
Question 53. Find the distillate and the residue rates in mole/hr, if the feed rate is 100 mol/hr; The compositions of feed, distillate and residue in terms of mole fraction are 0.65, 0.9 and 0.2.
  1.    36,64
  2.    64,36
  3.    20,80
  4.    80,20
 Discuss Question
Answer: Option B. -> 64,36
Answer: (b).64,36
Question 54. Find the heat given( in KJ) to the feed for the flash vaporization process if the ratio of residue to the distillate is 0.65 and the enthalpy of feed, distillate and the residue are 500, 800 and 200 KJ/kmol respectively. The feed rate is 100 kmol/hr.
  1.    4343
  2.    5353
  3.    6363
  4.    7373
 Discuss Question
Answer: Option C. -> 6363
Answer: (c).6363
Question 55. Large number of flash distillation equals a differential distillation.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 56. The top of the fractionators has ______ temperature.
  1.    High
  2.    Low
  3.    No
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Low
Answer: (b).Low
Question 57. The section above the feed tray in a fractionator is known as ______________
  1.    Enriching section
  2.    Rectifying section
  3.    Feed section
  4.    All of the mentioned
 Discuss Question
Answer: Option A. -> Enriching section
Answer: (a).Enriching section
Question 58. The bottom of the fractionators has a ______ temperature.
  1.    High
  2.    Low
  3.    No
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> High
Answer: (a).High
Question 59. The section below the feed tray in a fractionator is known as ______________
  1.    Enriching section
  2.    Rectifying section
  3.    Feed section
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> Rectifying section
Answer: (b).Rectifying section
Question 60. The use of vapour produced from the reboiler is
  1.    To strip out more volatile component from liquid
  2.    To strip out low volatile component from the liquid
  3.    To increase the temperature of the fractionator bottom
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> To strip out more volatile component from liquid
Answer: (a).To strip out more volatile component from liquid

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