The intake air-fuel mixture is used to push exhaust residual out of the open exhaust port called scavenging.

A. To prevent pressure build up B. To prevent temperature build up C. To increase the blow by gas D. To reduce the combustion leak

A. Exhaust system and intake system B. Crank case and intake system C. Crank case and exhaust system D. Exhaust system and catalytic converter

A. 20% B. 30% C. 35% D. 40%

A. Throttle body B. Intake manifold chamber C. Intake ports D. Combustion chambers