Question

At most how much ml of TEL can be added, so as to increase the octane rating of aviation fuel?

(a) 15 ml per gallon

(b) 9 ml per gallon

(c) 7 ml per gallon

(d) 5 ml per gallon

This question was addressed to me in homework.

The doubt is from Anti Knocking Agents topic in section Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct choice is (c) 7 ml per gallon

To explain I would say: Generally no applicable increase in octane number can be obtained by using more than 7 ml of TEL per gallon. Hence, not more than 7 ml of TEL per gallon are added for aviation fuel.