1.

How much air is used per kg of coal burnt in a boiler having a chimney of height 32 m to create draught of 170 N/m2. The temperature of outside air is 25 C and hot gases inside chimney is 330 C.

A. 10.16 kg of air per kg of coal burnt
B. 12.00 kg of air per kg of coal burnt
C. 14.32 kg of air per kg of coal burnt
D. 19.25 kg of air per kg of coal burnt
Answer» B. 12.00 kg of air per kg of coal burnt


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