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MCQs

Total Questions : 1935 | Page 7 of 194 pages
Question 61. Which of the following is a water tube boiler?
  1.    Lancashire boiler
  2.    Babcock and Wilcox boiler
  3.    Locomotive boiler
  4.    Cochran boiler
 Discuss Question
Answer: Option B. -> Babcock and Wilcox boiler
Question 62. Which of the following is a water tube boiler?
  1.    Locomotive boiler
  2.    Cochran boiler
  3.    Cornish boiler
  4.    Babcock and Wilcox boiler
 Discuss Question
Answer: Option D. -> Babcock and Wilcox boiler
Question 63. In water tube boilers
  1.    Water passes through the tubes which are surrounded by flames and hot gases
  2.    The flames and hot gases pass through the tubes which are surrounded by water
  3.    Forced circulation takes place
  4.    None of these
 Discuss Question
Answer: Option A. -> Water passes through the tubes which are surrounded by flames and hot gases
Question 64. The biggest size of thermal power unit operating in India is
  1.    30 MW
  2.    60 MW
  3.    100 MW
  4.    500 MW
 Discuss Question
Answer: Option D. -> 500 MW
Question 65. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are
  1.    Supplied by same manufacturer loose and assembled at site
  2.    Supplied mounted on a single base
  3.    Purchased from several parties and packed together at site
  4.    Packaged boiler does not exist
 Discuss Question
Answer: Option B. -> Supplied mounted on a single base
Question 66. The critical pressure ratio for gases is
  1.    0.528
  2.    0.546
  3.    0.577
  4.    0.582
 Discuss Question
Answer: Option A. -> 0.528
Question 67. By compounding the expansion of steam in two or more cylinders, the ratio of expansion
  1.    Does not change
  2.    Increases
  3.    Decreases
  4.    None of these
 Discuss Question
Answer: Option C. -> Decreases
Question 68. The steam temperature with increase in load in case of a boiler fitted with radiation superheater
  1.    Increases
  2.    Decreases
  3.    Remain unaffected
  4.    First increases and then decreases
 Discuss Question
Answer: Option B. -> Decreases
Question 69. When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by
  1.    (h - hf1)/2257
  2.    (h + hf1)/2257
  3.    (h × hf1)/2257
  4.    None of these
 Discuss Question
Answer: Option A. -> (h - hf1)/2257
Question 70. The effect of super-saturation is that the
  1.    Mass of the steam discharged increases
  2.    Entropy and specific volume of the steam increases
  3.    Exit velocity of steam reduces
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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