An exhaust gas analyzer (concentration sampling type) is being used to sample the exhaust of a vehicle that has an exhaust system leak. Which of these four gases will read higher than normal? A) HC B) CO C) CO₂ D) O₂

Question

Quizplus · Accepted Answer

An exhaust system leak allows outside air, which contains oxygen (O₂), to enter the exhaust stream. This results in a higher than normal reading of O₂ in the exhaust gas analyzer.

An Exhaust Gas Analyzer (Concentration Sampling Type) Is Being Used