Question

The blowby HC emissions are about 30% of the total HC emission from the engine.

(a) True

(b) False

The question was posed to me in an online interview.

My question is from Hydrocarbon Emissions topic in section Engine Emissions and their Control of IC Engine

Answer 1

The correct answer is:

(a) True

Blowby emissions refer to the unburned hydrocarbons (HC) that bypass the piston rings and enter the crankcase during engine operation. These emissions can account for around 30% of the total HC emissions from the engine, depending on the engine type, condition, and operating conditions. Blowby is especially significant in older or poorly maintained engines.