- Vehicles primarily produce three harmful gasses and two harmless/beneficial gasses. What are the harmful three? ______, ______,and ______ What are the harmless/beneficial two? __________ and___________
- What gas does the Exhaust Gas Recirculation (EGR) System control? ___________
- What is the optimum air/fuel mixture for the cleanest burn? _________
- Why was it necessary to remove lead from gasoline in the early 1970s?_______________________________________________________
- What vehicle emission does the evaporative (EVAP) system control? ____________
- Black smoke from the exhaust is a strong indicator of ___________ emissions (it’s one of the three)
- What actually happens at the molecular level when fuel ‘burns’ in the combustion chamber? ___________________________________________________________
- What does the term “stoichiometric” mean? _________________________________
- Does alcohol produce more power and fuel economy than gasoline? _________________________________
- During a combustion event, why does the ignition spark ‘burn out’ while energy is still available in the ignition coil? ____________________________________________
- If an engine is running too hot, which harmful gas increases? __________________
If an engine is running too cold, which gasses increase? _____________________