Question

How much percentile of excess air is used, if the theoretical amount of air is 95 kg and the actual amount of air present is 100 kg?

(a) 5.26

(b) 5

(c) 10.26

(d) 10

I had been asked this question by my college professor while I was bunking the class.

The above asked question is from Numerical Problems Based on Combustion and Fuel Gas Analysis in portion Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct option is (a) 5.26

Explanation: The formulae for calculating the percentile excess amount of air is,

% of excess air = [(actual air used – theoretical air used)/theoretical air used] × 100

= [(100-95)/95)] × 100

= 5.26 %.