Question

The hydrocarbons appear due to flame quenching near the metallic walls.

(a) False

(b) True

I got this question in exam.

Asked question is from Hydrocarbon Emissions in portion Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(b) True

Hydrocarbons (HC) can appear due to flame quenching near the metallic walls of the combustion chamber. When the flame front approaches these cooler surfaces, it can be quenched or extinguished before the combustion process is complete, leaving unburned hydrocarbons in the exhaust. This is particularly a concern in internal combustion engines, where heat transfer to the walls and incomplete combustion can lead to higher HC emissions.