R

Ram Sharma • 193.86K Points
Coach 

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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