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MCQs

Total Questions : 2441 | Page 11 of 245 pages
Question 101. Producer gas comprises mainly of
  1.    CO & N₂
  2.    CO & H₂
  3.    CO₂ & N₂
  4.    CO₂ & H₂
 Discuss Question
Answer: Option A. -> CO & N₂
Question 102. Gobar gas constitutes mainly of
  1.    CH₄ & CO₂
  2.    CO & CO₂
  3.    CH₄ & N₂
  4.    CO & N₂
 Discuss Question
Answer: Option A. -> CH₄ & CO₂
Question 103. Flue gas from the heating chamber of byproduct coke ovens is removed by
  1.    Forced draft fan
  2.    Induced draft fan
  3.    Steam ejector
  4.    Natural draft
 Discuss Question
Answer: Option D. -> Natural draft
Question 104. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.
  1.    5
  2.    10
  3.    20
  4.    35
 Discuss Question
Answer: Option C. -> 20
Question 105. Removal of hydrogen from coke oven gas
  1.    Increases its calorific value
  2.    Decreases its calorific value
  3.    Does not alter its calorific value
  4.    Is not possible on commerical scale
 Discuss Question
Answer: Option A. -> Increases its calorific value
Question 106. A coal that softens and fuses on heating is
  1.    Classified
  2.    Carbonised
  3.    Caking
  4.    Non-caking
 Discuss Question
Answer: Option C. -> Caking
Question 107. Coke having higher porosity has
  1.    Lower bulk density
  2.    Lower strength
  3.    Higher reactivity
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 108. Critical Air Blast (CAB) value of coke is a direct measure of its
  1.    Reactivity
  2.    Hardness
  3.    Strength
  4.    None of these
 Discuss Question
Answer: Option A. -> Reactivity
Question 109. A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon
  1.    Is less liable to spontaneous combustion on storage
  2.    Is more difficult to ignite and produces a shorter flame
  3.    Requires smaller combustion space and less secondary air
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 110. The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be
  1.    21
  2.    77
  3.    79
  4.    29
 Discuss Question
Answer: Option A. -> 21

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