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Question
In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of__________________?
Options:
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
Answer: Option C
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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