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MCQs

Total Questions : 143 | Page 5 of 15 pages
Question 41. Guess the exact relation between the vapour phase mole fraction and relative volatility.
  1.    y= A*x/(1+x(A+1))
  2.    y= A*x/(1-x(A-1))
  3.    y= A*x/(1+x(A-1))
  4.    y= A*x/(1-x(A+1))
 Discuss Question
Answer: Option C. -> y= A*x/(1+x(A-1))
Answer: (c).y= A*x/(1+x(A-1))
Question 42. Given the total pressure is 2 atm. Also the partial pressure of the two components in an ideal solution is 1 atm and 0.5 atm. It shows __________ deviation.
  1.    Positive
  2.    Negative
  3.    Neutral
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Positive
Answer: (a).Positive
Question 43. If the vapour pressure of the two components in a binary mixture is same, then it is a________
  1.    Isotope
  2.    Azeotrope
  3.    Differential boiling point
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Azeotrope
Answer: (b).Azeotrope
Question 44. Minimum boiling azeotrope has_________
  1.    Large positive deviation
  2.    Less positive deviation
  3.    Large negative deviation
  4.    Less negative deviation
 Discuss Question
Answer: Option A. -> Large positive deviation
Answer: (a).Large positive deviation
Question 45. Alternative word of Azeotrope is a Differential-boiling point.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 46. Flash vaporization is a
  1.    Equilibrium distillation
  2.    Differential distillation
  3.    Simple distillation
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Equilibrium distillation
Answer: (a).Equilibrium distillation
Question 47. The feed is directly passed to the flash vaporization column
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 48. Find the ratio of distillate to residual flow rates, if a binary mixture containing 65% of more volatile component while the distillate and the residue compositions are 90% and 30%.
  1.    0.4
  2.    1.4
  3.    2.4
  4.    3.4
 Discuss Question
Answer: Option C. -> 2.4
Answer: (c).2.4
Question 49. Binary mixture of 100 kmol/hr enters into a flash drum has equimolar composition. The distillate obtained is 60 kmol/hr and the enthalpy of distillate, residue and feed are 500 KJ/kmol, 200 KJ/kmol and 400 KJ/kmol. Find the bottom flow rate in kmol/hr.
  1.    10
  2.    20
  3.    30
  4.    40
 Discuss Question
Answer: Option C. -> 30
Answer: (c).30
Question 50. What happens to the liquid after preheating when enter to the cyclonic flash drum?
  1.    Starts to evaporate
  2.    Split with centrifugal force
  3.    Comes out in residue
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Split with centrifugal force
Answer: (b).Split with centrifugal force

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