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MCQs

Total Questions : 143 | Page 7 of 15 pages
Question 61. If the reflux ratio increases _________ increases.
  1.    Fixed cost
  2.    Operating cost
  3.    Optimum
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> Operating cost
Answer: (b).Operating cost
Question 62. If the reflux increases ________ increases in the fractionator.
  1.    Diameter
  2.    Length
  3.    Volume
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Diameter
Answer: (a).Diameter
Question 63. Total cost is
  1.    Operating + optimum cost
  2.    Fixed + optimum cost
  3.    Fixed + operating cost
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Fixed + operating cost
Answer: (c).Fixed + operating cost
Question 64. At optimum reflux ratio,
  1.    Operating and optimum cost are equal
  2.    Operating and fixed cost are equal
  3.    Fixed and optimum cost are equal
  4.    Total and optimum cost are equal
 Discuss Question
Answer: Option B. -> Operating and fixed cost are equal
Answer: (b).Operating and fixed cost are equal
Question 65. Total cost will be minimum at
  1.    Minimum reflux ratio
  2.    Maximum reflux ratio
  3.    Optimum reflux ratio
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Optimum reflux ratio
Answer: (c).Optimum reflux ratio
Question 66. Estimate the fixed cost if the operational cost is 7 lakhs and the total cost is 15 lakhs.
  1.    21 lakhs
  2.    8 lakhs
  3.    7 lakhs
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> 8 lakhs
Answer: (b).8 lakhs
Question 67. Estimate the operational cost if the fixed cost is 15 lakhs.
(Hint: reflux ratio= optimum)
  1.    15 lakhs
  2.    30 lakhs
  3.    0
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> 15 lakhs
Answer: (a).15 lakhs
Question 68. The internal reboilers are preferred for maintaining the economy of an industry.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 69. The vertical-syphon reboilers are not preferred because of
  1.    Fouling
  2.    Overheat
  3.    Large tubes
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Fouling
Answer: (a).Fouling
Question 70. Which of the following reboiler is considering as an additional tray?
  1.    Jacketed kettle
  2.    Internal reboiler
  3.    Kettle-reboiler
  4.    None of the mentioned
 Discuss Question
Answer: Option C. -> Kettle-reboiler
Answer: (c).Kettle-reboiler

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