How and when are nitrogen oxide (NOX) emissions formed in the internal combustion engine?
What will be an ideal response?
Nitrogen oxides (NOX) are formed in the combustion process as nitrogen and oxygen in the air charge combine when temperatures exceed 2500°F (1371.1°C) as the air/fuel mixture is burned. Under extreme temperatures and pressures, nitrogen is forced to combine with oxygen in varying amounts, resulting in oxides of nitrogen. NOX emissions are measured in parts-per-million (ppm) with an exhaust analyzer.
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In extremely acid soils (pH 3.0 to 4.0 ) most of the Al3+ and H+ ions are bound tightly by organic matter and silicate clays and are not readily exchangeable
Indicate whether the statement is true or false
Which air control door selects where the air is directed?
A) Blend door B) Inlet door C) Mode door D) Mix door
The two main types of ferrous metals are ____________________ and ____________________.
Fill in the blank(s) with the appropriate word(s).