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MCQs

Total Questions : 1628 | Page 7 of 163 pages
Question 61. Stage efficiency for packed tower varies with the
  1.    Type & size of packing
  2.    Fluid rates and fluid properties
  3.    Operating pressure and column diameter
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 62. It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than
  1.    0.99
  2.    0.95
  3.    0.80
  4.    0.55
 Discuss Question
Answer: Option C. -> 0.80
Question 63. Column support for the roof of cylindrical storage tank must be provided for
  1.    Small diameter tanks
  2.    Large diameter tanks
  3.    Small diameter tall tanks
  4.    All of the above
 Discuss Question
Answer: Option B. -> Large diameter tanks
Question 64. Generally, elliptical dished heads
  1.    Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m²
  2.    Resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter
  3.    Are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 65. In a shell and tube heat exchanger, the clearance of the tube is generally
  1.    Not less than one-fourth of the tube diameter or 3/16"
  2.    More than the tube diameter
  3.    Equal to the tube diameter
  4.    More in case of triangular pitch as compared to the square pitch tube layout
 Discuss Question
Answer: Option A. -> Not less than one-fourth of the tube diameter or 3/16"
Question 66. Filtration rate is affected by the
  1.    Pressure drop across the cake & filter medium
  2.    Cake & filter medium resistance
  3.    Area of filtering surface & the viscosity of filtrate
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 67. In distillation columns, bubble caps are held in place over trays by
  1.    Rivets
  2.    A hold down bar
  3.    Bolts
  4.    Both B and C
 Discuss Question
Answer: Option D. -> Both B and C
Question 68. __________ strain is measured using a 'strain rosetter'.
  1.    Volumetric
  2.    Shear
  3.    Linear
  4.    None of these
 Discuss Question
Answer: Option C. -> Linear
Question 69. In case of a continuous distillation column, increase in reflux ratio may result in the
  1.    Lower fixed charges for the column
  2.    Greater cost for the reboiler heat supply
  3.    Greater cost for the condenser coolant
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 70. Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as
  1.    Δp = G
  2.    Δp = G0.5
  3.    Δp = G2
  4.    Δp = 1/G0.6
 Discuss Question
Answer: Option C. -> Δp = G2

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