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MCQs

Total Questions : 1628 | Page 11 of 163 pages
Question 101. Lug support is meant for supporting __________ vessels.
  1.    Large horizontal cylindrical
  2.    Tall but empty
  3.    Small
  4.    Thick walled tall
 Discuss Question
Answer: Option C. -> Small
Question 102. Pick out the wrong statement about distillation operation
  1.    Distillation under vacuum is a substitute for steam distillation
  2.    In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation
  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.    Flash distillation, differential distillation & steam distillation are all continuous distillation processes
 Discuss Question
Answer: Option D. -> Flash distillation, differential distillation & steam distillation are all continuous distillation processes
Question 103. Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter )
  1.    0.2 D
  2.    0.5 D
  3.    0.66 D
  4.    0.80 D
 Discuss Question
Answer: Option A. -> 0.2 D
Question 104. What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?
  1.    6.5 cms
  2.    6.5 mm
  3.    Equal to tube I.D
  4.    Equal to tube O.D
 Discuss Question
Answer: Option B. -> 6.5 mm
Question 105. In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.
  1.    1
  2.    8
  3.    80
  4.    180
 Discuss Question
Answer: Option B. -> 8
Question 106. The dust collection efficiency of electrostatic precipitator increases with increase in the
  1.    Gas flow rate
  2.    Electrode area
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option B. -> Electrode area
Question 107. If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
  1.    D/2 or minimum 2" to 5D
  2.    D/5 or minimum 2" to 5D
  3.    D/5 or minimum 2" to D
  4.    None of these
 Discuss Question
Answer: Option B. -> D/5 or minimum 2" to 5D
Question 108. Movement of pipeline caused by thermal expansion is taken care by providing
  1.    Expansion joint
  2.    Changes in its direction
  3.    Change in the shape of pipeline
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 109. The minimum baffle height should be
  1.    Equal to the impeller diameter
  2.    Twice the impeller diameter
  3.    Twice the tank diameter
  4.    3/4 of the tank height
 Discuss Question
Answer: Option B. -> Twice the impeller diameter
Question 110. What is the slope of the operating line in the stripping section of a distillation column?
  1.    0
  2.    ?
  3.    > 1
  4.    < 1
 Discuss Question
Answer: Option C. -> > 1

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