Question

What is the work of TEL in addition in petrol engine?

(a) It increases its induction period by 200-300 %

(b) It decreases the induction period by 50 %

(c) It increases the induction period by 50-100 %

(d) It increases the induction period by 400-500 %

This question was addressed to me at a job interview.

I need to ask this question from Anti Knocking Agents in portion Fuels and Combustion of Engineering Chemistry II

Answer 1

Right answer is (a) It increases its induction period by 200-300 %

To explain: The addition of TEL increases the induction period of the petrol engine by 200-300 % by interaction with the free radicals whereby lead oxide is produced. As soon as the explosive combustion occurs, the lead oxide is rapidly reduced to metallic lead.