Question

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: (a).Calorific value of the fuel.

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Q. Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?

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