Question

If both CO and O2, both are indicated in the appreciable amount in the flue gas analysis, which type of combustion is seen?

(a) Regular and non-uniform combustion

(b) Irregular and non-uniform combustion

(c) Regular and uniform combustion

(d) Irregular and uniform combustion

I have been asked this question by my school teacher while I was bunking the class.

My question is from Efficiency of Combustion in division Fuels and Combustion of Engineering Chemistry II

Answer 1

The correct option is (b) Irregular and non-uniform combustion

Easy explanation: If both CO and O2 are present in an appreciable amount, then the combustion is irregular and non-uniform. That means, in some parts of the furnace, there is an excess of air and in some other parts, the supply of air is insufficient.