The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?

The excess air required for the combustion of pulverized coal is of th

1.	The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?
A.	5
B.	15
C.	30
D.	45
Answer» C. 30

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The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?

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