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MCQs

Total Questions : 1628 | Page 18 of 163 pages
Question 171. Pressure drop per tray in the atmospheric distillation column is about __________ psi.
  1.    0.01 - 0.5
  2.    0.07 - 0.12
  3.    0.5 - 1.0
  4.    1 - 3
 Discuss Question
Answer: Option B. -> 0.07 - 0.12
Question 172. A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap.
  1.    19
  2.    38
  3.    76
  4.    95
 Discuss Question
Answer: Option B. -> 38
Question 173. Optimum reflux ratio in a continuous distillation column is determined by the
  1.    Maximum permissible vapour velocity
  2.    Flooding limit of the column
  3.    Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
  4.    None of these
 Discuss Question
Answer: Option C. -> Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
Question 174. What is the slope of the operating line in the rectifying section of a distillation coloumn?
  1.    0
  2.    ∞
  3.    > 1
 Discuss Question
Answer: Option D. -> Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
Question 175. Nominal size of a pipe is an indication of its __________ diameter.
  1.    Inner
  2.    Outer
  3.    Approximate
  4.    None of these
 Discuss Question
Answer: Option C. -> Approximate
Question 176. Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter.
  1.    1.5 to 2
  2.    2.5 to 5
  3.    5 to 10
  4.    10 to 15
 Discuss Question
Answer: Option B. -> 2.5 to 5
Question 177. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by __________ times the hole diameter.
  1.    Two
  2.    Five
  3.    Ten
  4.    Twenty
 Discuss Question
Answer: Option A. -> Two
Question 178. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.
  1.    1 to 1.5
  2.    2.5 to 3.5
  3.    4 to 5
  4.    6 to 8
 Discuss Question
Answer: Option A. -> 1 to 1.5
Question 179. Baffle width is normally taken as __________ times the tank diameter.
  1.    0.1-0.12
  2.    0.4-0.5
  3.    0.45-0.6
  4.    0.2-0.45
 Discuss Question
Answer: Option A. -> 0.1-0.12
Question 180. In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
  1.    l/5th
  2.    l/15th
  3.    l/30th
  4.    l/50th
 Discuss Question
Answer: Option B. -> l/15th

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