A

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Q. In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of

  • (A) Use of non-preheated combustion air
  • (B) Use of pulverised solid fuels
  • (C) Imperfect mixing of fuel & air and infiltration of air
  • (D) Use of excessive positive draft in the furnace

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