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MCQs

Total Questions : 2441 | Page 28 of 245 pages
Question 271. Which is the heaviest fuel gas out of the following?
  1.    Blast furnace gas
  2.    Coke oven gas
  3.    Water gas
  4.    Carburetted water gas
 Discuss Question
Answer: Option A. -> Blast furnace gas
Question 272. By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of
  1.    Tar
  2.    Benzol
  3.    Ammonia
  4.    None of these
 Discuss Question
Answer: Option C. -> Ammonia
Question 273. In low temperature carbonisation of coal, the
  1.    Yield of coke oven gas is 290 Nm³ /ton dry coal
  2.    Volatile matter in coke is zero
  3.    Temperature maintained is 700°C
  4.    Yield of tar is about 3% of dry coal
 Discuss Question
Answer: Option C. -> Temperature maintained is 700°C
Question 274. Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?
  1.    Benzol
  2.    Pitch-cresosote mixture (PCM)
  3.    Napthalene
  4.    Ethylene
 Discuss Question
Answer: Option D. -> Ethylene
Question 275. Softening temperature of coal ash is a measure of the __________ of coal.
  1.    Caking tendency
  2.    Coking tendency
  3.    Clinkering tendency
  4.    Size stability
 Discuss Question
Answer: Option C. -> Clinkering tendency
Question 276. Lurgi coal gasifier is a pressurised __________ bed reactor.
  1.    Moving
  2.    Fixed
  3.    Fluidised
  4.    Entrained
 Discuss Question
Answer: Option A. -> Moving
Question 277. Which of the following fuels is the best for burning on chain grate stoker?
  1.    Non-caking coal
  2.    Caking coal
  3.    Coking coal
  4.    Pulverised coal
 Discuss Question
Answer: Option A. -> Non-caking coal
Question 278. In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing
  1.    CO
  2.    CO₂
  3.    O₂
  4.    H₂O
 Discuss Question
Answer: Option A. -> CO
Question 279. A gaseous fuel in order to develop luminousity on burning, must contain
  1.    Carbon monoxide
  2.    Hydrocarbons
  3.    Hydrogen
  4.    Oxygen
 Discuss Question
Answer: Option B. -> Hydrocarbons
Question 280. Presence of nitrogen in combustion air does not reduce the
  1.    Amount of heat liberated
  2.    Flame temperature
  3.    Flue gas temperature
  4.    Any of the above
 Discuss Question
Answer: Option A. -> Amount of heat liberated

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