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MASSACHUSETTS MA SOLID FUEL BURNING APPLIANCE EXAM 2026 COMPLETE STUDY GUIDE
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◉ Combustion Answer: involves reactions of the elements in the burning substance with oxygen in the air , producing oxides ◉ What does the comubstion of hydrocarbon fuels release? Answer: energy ◉ What happens during combustion? Answer: the carbon and hydrogen in the fuels are oxidised ◉ What is produced after combustion? Answer: Oxides of each element in the burning substance ◉ What gases are released when a fuel burns? Answer: Carbon dioxide , Water vapour, Carbon monoxide, Sulfur dioxide, Oxides of nitrogen, particulates ◉ Carbon dioxide Answer: when enough oxygen is present ( complete combustion )
◉ Water vapour Answer: hydrogen oxide ◉ Carbon monoxide Answer: when there is not enough oxygen present ( incomplete combustion ) ◉ Sulfur dioxide Answer: most fuels contain some sulfur ◉ Oxides of nitrogen Answer: formed at high temperatures ( in furnaces and engines ) because 78 % of the air is nitrogen gas ◉ particulates Answer: consisting of soot ( carbon ) and unburnt fuels. This happens when there is a limited amount of air , such as in an engine ( incomplete combustion ). ◉ What causes acid rain? Answer: Sulfur dioxide and oxides of nitrogen ◉ How is acid rain harmful? Answer: can react with the stone and metal of structures such as buildings. It also can harm plant and animal life ◉ What does carbon dioxide cause? Answer: global warming