The environmentally harmful blow-by gas is also harmful to the engine, because

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