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MCQs

Total Questions : 2441 | Page 239 of 245 pages
Question 2381. Preheating of a gaseous fuel results in increased____________________?
  1.    Flame length
  2.    Flame temperature
  3.    Quantity of flue gas
  4.    Ignition temperature
 Discuss Question
Answer: Option B. -> Flame temperature
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2382. Which of the following is not a manufactured fuel ?
  1.    Furnace oil
  2.    Bagasse
  3.    Semi-coke
  4.    Kerosene
 Discuss Question
Answer: Option B. -> Bagasse
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2383. In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the______________?
  1.    Gas yield is less
  2.    Tar yield is more
  3.    Ignition temperature of coke produced is less
  4.    Aromatic content of tar produced is more
 Discuss Question
Answer: Option D. -> Aromatic content of tar produced is more
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2384. One kg of carbon for theoretically complete combustion requires ______________ kg of air?
  1.    11.5
  2.    0.5
  3.    23
  4.    12
 Discuss Question
Answer: Option A. -> 11.5
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2385. ____________ process is meant for direct hydrogenation of coal to produce liquid fuel?
  1.    Fischer-Tropsch
  2.    Bergius
  3.    Lurgi
  4.    None of these
 Discuss Question
Answer: Option B. -> Bergius
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2386. Naphthalene recovered from coke oven gas is used___________________?
  1.    As moisture proof coating on fibres
  2.    As moth balls (insecticides)
  3.    As a fuel in furnaces
  4.    For making electrodes
 Discuss Question
Answer: Option B. -> As moth balls (insecticides)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2387. Grindability index of a coal is 100. It implies that the ___________________?
  1.    Coal can be pulverised with great difficulty
  2.    Coal can’t be pulverised
  3.    Coal can be easily pulverised
  4.    Power consumption in grinding the coal will be very high
 Discuss Question
Answer: Option C. -> Coal can be easily pulverised
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2388. When incomplete combustion loss is high, the flue gas analysis shows large amount of ________________?
  1.    CO2
  2.    CO
  3.    O2
  4.    C
 Discuss Question
Answer: Option B. -> CO
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2389. Higher efficiency in the combustion of solid fuel cannot be achieved by________________?
  1.    Proper fuel preparation
  2.    Keeping the flue gas exhaust temperature very high
  3.    Adopting efficient-fuel firing technique & equipment
  4.    Supplying correct quantity of combustion air
 Discuss Question
Answer: Option B. -> Keeping the flue gas exhaust temperature very high
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2390. If oxygen content in the flue gas rises too high, fuel is being wasted by _______________?
  1.    Incomplete combustion
  2.    Dry gas/stack gas loss
  3.    Moisture loss
  4.    None of these
 Discuss Question
Answer: Option B. -> Dry gas/stack gas loss
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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