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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. [Wrong Answer] |
B. | use of pulverised solid fuels. [Wrong Answer] |
C. | imperfect mixing of fuel & air and infiltration of air. [Correct Answer] |
D. | use of excessive positive draft in the furnace. [Wrong Answer] |