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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 | |