The exhaust gas recirculation system reduces ______.
A)hydrocarbons
B)carbon monoxide
C)oxides of nitrogen
D)All the answers are correct.

Question

Quizplus · Accepted Answer

The exhaust gas recirculation (EGR) system primarily reduces oxides of nitrogen (NOx) emissions by recirculating a portion of an engine's exhaust gas back to the engine cylinders, diluting the oxygen in the incoming air stream and reducing the peak temperature during combustion.

The Exhaust Gas Recirculation System Reduces ______