PA Emissions Inspection Exam Questions with Complete & Updated Solutions

PA Emissions Inspection Exam Questions with Complete & Updated Solutions What health problems can pollution cause? - Answer ️️ -Respiratory issues What percent of air pollution is caused by vehicles? - Answer ️️ -20% How much less air pollution do we have now than in the 1960s? (%) - Answer ️️ -98% less What is the average thermal efficiency? (%) - Answer ️️ -20% Where does 80% of the rest of the fuel go to? - Answer ️️ -Friction, heat, and emissions What are the 5 major pollutants? - Answer ️️ -Hydrocarbons (HC), Carbon monoxide (CO), Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter What are hydrocarbons? - Answer ️️ -Unburned fuel of carbon and hydrogen What are hydrocarbons emitted through? - Answer ️️ -Incomplete combustion and fuel evaporation What are hydrocarbons caused by? - Answer ️️ -Misfire, rich, ignition timing, engine deficiencies, and fuel injectors What has lowered hydrocarbons? - Answer ️️ -OBD 2, component controls, fuel delivery, ignition, emissions system, and EVAPs