Oxides of nitrogen (NOx) contribute to the formation of
A. photochemical smog.
B. acid rain.
C. particulate emissions.
D. high levels of CO2.
Technician A says that a converter that rattles when tapped with a mallet should be replaced. Technician B says that the root cause of a converter failure should be diagnosed and repaired before a replacement converter is installed. Who is correct?Â
 Two technicians are explaining what exhaust gas emissions tell you about engine operation. Technician A says that the higher the level of CO2 in the exhaust stream, the more efficiently the engine is operating. Technician B says that CO2 levels of 20 to 25 percent are considered acceptable.Â
 Technician A says that a 3 í— 5 card should be held against the oil fill opening if the positive crankcase ventilation (PCV) system is operating correctly. Technician B says that if a PCV valve rattles, it's working properly. Who is correct?Â
Oxygen combines with nitrogen in the air to form NOx at about _____
RepairPal Certified shops can diagnose and repair your 2012 BMW 128i. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
