Which of the following is not increased by using preheated combustion – McqOptions

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1.	Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?
A.	Calorific value of the fuel.
B.	Flame temperature achieved.
C.	Speed of combustion of fuel.
D.	Heat transfer rate to the stock in the furnace.
Answer» B. Flame temperature achieved.

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