PA Emissions Inspection 130 Questions with Complete Solutions 100% Verified What health problems can pollution cause? - Correct Answer Respiratory issues What percent of air pollution is caused by vehicles? - Correct Answer 20% How much less air pollution do we have now than in the 1960s? (%) - Correct Answer 98% less What is the average thermal efficiency? (%) - Correct Answer 20% Where does 80% of the rest of the fuel go to? - Correct Answer Friction, heat, and emissions What are the 5 major pollutants? - Correct Answer Hydrocarbons (HC), Carbon monoxide (CO), Oxides of nitrogen (NOx), Sulfur dioxide (SO2), and particulate matter What are hydrocarbons? - Correct Answer Unburned fuel of carbon and hydrogen What are hydrocarbons emitted through? - Correct Answer Incomplete combustion and fuel evaporation What are hydrocarbons caused by? - Correct Answer Misfire, rich, ignition timing, engine deficiencies, and fuel injectors What has lowered hydrocarbons? - Correct Answer OBD 2, component controls, fuel delivery, ignition, emissions system, and EVAPs Can you see or smell carbon monoxide? - Correct Answer No Is carbon monoxide harmful or nonharmful? - Correct Answer Harmful How is carbon monoxide made? - Correct Answer Incomplete burning of fuel 1 / 2
What is carbon monoxide caused by?` - Correct Answer rich, dirty air filter, fuel injectors, high fuel pressure, defective sensors, plugged PCV valve, heat riser valve stuck open, air pump malfunction, oil diluted with gas How is nitrogen oxide made? - Correct Answer Combustion of fuel at high temperatures What is nitrogen oxide the cause of? - Correct Answer Acid rain What type of health issues does nitrogen oxide cause? - Correct Answer Respiratory issues What is nitrogen oxide caused by? - Correct Answer lean, defective EGR, high temperature, vacuum leaks, advance ignition timing What can too little or too much oxygen cause? - Correct Answer Improper combustion What is too little oxygen caused by? - Correct Answer rich, dirty air filter, fuel injectors, high fuel pressure, defective sensors, restricted PCV valve, EVAP purges at idle What is too much oxygen caused by? - Correct Answer lean, misfire, vacuum leak, exhaust leak Where is ozone/smog made at? - Correct Answer Ground level What creates smog? - Correct Answer Oxides of nitrogen and hydrocarbons mixed together in the sunlight What health issue can smog cause? - Correct Answer Damaged lungs What is particulates? - Correct Answer Dirt, dust, etc.How are particulates made? - Correct Answer Combustion What is the stoichiometric level? - Correct Answer 14.7 parts air to 1 part fuel
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