PA Emissions – Gases Exam Questions with 100% Correct Answers

PA Emissions – Gases Exam Questions with 100% Correct Answers Air pollution - Answer ️️ -"contamination of the atmosphere by gaseous, liquid, or solid wastes or byproducts that can endanger human health and the health and welfare of plants and animals, or can attack materials, reduce visibility, or produce undesirable odors." can be emitted from either natural or human-made sources. 3 major pollutants - Answer ️️ -hydrocarbons (HCs), carbon monoxide (CO), and nitrogen oxides (NOx). Other pollutants include sulfur dioxide (SO2) what happens to 80% of energy fuel contains - Answer ️️ -It is lost to three sources: friction (drag of the moving parts), heat, and emissions (which is basically energy wasted and released out of the tailpipe as toxic pollutants). how much air pollution comes from vehicles - Answer ️️ -the United States Environmental Protection Agency (EPA) estimates that 20% of all U.S. air pollution is produced by cars and trucks. In cities, this percentage can rise as high as 90%. Excessive Hydrocarbons are emitted by vehicles through what two sources - Answer ️️ -incomplete combustion and fuel evaporation. Tailpipe Hydrocarbon emissions can be caused by - Answer ️️ -ignition system misfiring, improper ignition timing, rich fuel mixtures, engine mechanical