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MCQs

Total Questions : 1628 | Page 160 of 163 pages
Question 1591. What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?
  1.    6.5 mm
  2.    Equal to tube O.D
  3.    Equal to tube I.D
  4.    6.5 cms
 Discuss Question
Answer: Option A. -> 6.5 mm
Question 1592. In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.
  1.    8
  2.    1
  3.    180
  4.    80
 Discuss Question
Answer: Option A. -> 8
Question 1593. Lug support is meant for supporting __________ vessels.
  1.    Small
  2.    Large horizontal cylindrical
  3.    Tall but empty
  4.    Thick walled tall
 Discuss Question
Answer: Option A. -> Small
Question 1594. Pick out the wrong statement about distillation operation
  1.    Flash distillation, differential distillation & steam distillation are all continuous distillation processes
  2.    Distillation under vacuum is a substitute for steam distillation
  3.    In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other
  4.    In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation
 Discuss Question
Answer: Option A. -> Flash distillation, differential distillation & steam distillation are all continuous distillation processes
Question 1595. In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as
  1.    0.25
  2.    0.8
  3.    0.1
  4.    0.5
 Discuss Question
Answer: Option B. -> 0.8
Question 1596. The raio, (properller agitator dia/tank dia) is normally taken as
  1.    0.5-0.65
  2.    0.15-030
  3.    0.60-0.90
  4.    0.75-0.85
 Discuss Question
Answer: Option B. -> 0.15-030
Question 1597. For high pressure process equipments/vessels, the connected nozzle should be
  1.    Welded
  2.    Screwed
  3.    Flanged
  4.    Brazed
 Discuss Question
Answer: Option C. -> Flanged
Question 1598. In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .
  1.    3.8
  2.    1.2
  3.    0.5
  4.    6.8
 Discuss Question
Answer: Option A. -> 3.8
Question 1599. Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
  1.    More than
  2.    Either more or less (depending upon relative volatility)
  3.    Less than
  4.    Same as
 Discuss Question
Answer: Option A. -> More than
Question 1600. Length to diameter ratio of most rotary driers is in the range of
  1.    10 to 20
  2.    20 to 30
  3.    4 to 10
  4.    1 to 2
 Discuss Question
Answer: Option C. -> 4 to 10

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