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MCQs

Total Questions : 1628 | Page 5 of 163 pages
Question 41. Speed of industrial paddle agitator ranges from __________ rpm.
  1.    1 to 5
  2.    20 to 100
  3.    500 to 750
  4.    1000 to 2000
 Discuss Question
Answer: Option B. -> 20 to 100
Question 42. Which of the following lengths of heat exchanger tubes are normally not used in practice?
  1.    2.5 metres
  2.    6 metres
  3.    10 metres
  4.    0.5 metre
 Discuss Question
Answer: Option C. -> 10 metres
Question 43. Cylindrical pressure vessels in horizontal condition is generally supported on a __________ support.
  1.    Lug
  2.    Skirt
  3.    Saddle
  4.    Guy wire
 Discuss Question
Answer: Option C. -> Saddle
Question 44. __________ closure is the weakest enclosure for cylindrical vessels.
  1.    Hemispherical
  2.    Torispherical
  3.    Conical or flat plate
  4.    Elliptical
 Discuss Question
Answer: Option C. -> Conical or flat plate
Question 45. The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?
  1.    To increase the residence time of shell side fluid
  2.    To provide support to the tube bundle
  3.    To reduce the induced vibration in the tubes
  4.    To increase the tube side heat transfer co-efficient by inducing turbulence
 Discuss Question
Answer: Option D. -> To increase the tube side heat transfer co-efficient by inducing turbulence
Question 46. Hold up of material in a operating rotary drier is in the range of
  1.    0.05 to 0.15
  2.    0.25 to 0.50
  3.    0.5 to 0.8
  4.    0.8 to 0.9
 Discuss Question
Answer: Option A. -> 0.05 to 0.15
Question 47. Height of the flights in the rotary drier is in the range of
  1.    0.08 to 0.12 d
  2.    0.02 to 0.05 d
  3.    0.2 to 0.5 d
  4.    0.5 to 0.6 d
 Discuss Question
Answer: Option A. -> 0.08 to 0.12 d
Question 48. The value of fouling factor depends upon the
  1.    Characteristic of process fluid
  2.    Velocity of process fluid containing suspended solids
  3.    Suspended solids in the fluid
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 49. In a thin cylindrical shell, the hoop stress is __________ stress.
  1.    Radial
  2.    Circumferential tensile
  3.    Compressive
  4.    Longitudinal
 Discuss Question
Answer: Option B. -> Circumferential tensile
Question 50. The operating pressure drop range in a bag filter is about __________ mm water gauge.
  1.    50-150
  2.    5-10
  3.    500-1500
  4.    1500-2500
 Discuss Question
Answer: Option A. -> 50-150

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