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MCQs

Total Questions : 2441 | Page 6 of 245 pages
Question 51. Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its
  1.    Emissivity factor is higher
  2.    Sulphur content is lower
  3.    Flue gas has lower dew point thereby facilitating more waste heat recovery
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 52. The calorific value of natural gas is about __________ kcal/Nm³.
  1.    10, 000
  2.    2500
  3.    25, 000
  4.    35, 000
 Discuss Question
Answer: Option A. -> 10, 000
Question 53. Calorific value of wood gas is about __________ kcal/Nm³.
  1.    1500
  2.    3300
  3.    5400
  4.    8500
 Discuss Question
Answer: Option B. -> 3300
Question 54. Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³.
  1.    4000
  2.    2500
  3.    6500
  4.    10000
 Discuss Question
Answer: Option C. -> 6500
Question 55. The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.
  1.    5000
  2.    25, 000
  3.    10, 000
  4.    15, 000
 Discuss Question
Answer: Option B. -> 25, 000
Question 56. The calorific value of producer gas is around __________ kcal/Nm³
  1.    1300
  2.    500
  3.    4500
  4.    9000
 Discuss Question
Answer: Option A. -> 1300
Question 57. Yield of pitch from distillation of high temperature tar is around __________ percent.
  1.    10
  2.    25
  3.    65
  4.    90
 Discuss Question
Answer: Option C. -> 65
Question 58. Supply of excess air for complete combustion of fuel is necessitated to facilitate
  1.    Its thorough mixing with air
  2.    Attainment of chemical equilibrium
  3.    Attainment of high temperature
  4.    None of these
 Discuss Question
Answer: Option A. -> Its thorough mixing with air
Question 59. In high temperature carbonisation of coal compared to low temperature carbonisation
  1.    Yield of ammonia is less
  2.    Aromatic content of tar is low
  3.    H₂ content in the coke oven gas is more
  4.    Calorific value of the coke oven gas is lower
 Discuss Question
Answer: Option C. -> H₂ content in the coke oven gas is more
Question 60. Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
  1.    3-5
  2.    25-30
  3.    60-65
  4.    95-100
 Discuss Question
Answer: Option B. -> 25-30

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