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compression and ignition

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Q: In which step of the four-stroke engine cycle does the spark plug initiate the combustion reaction?
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In which step of the four stroke engine cycle does the spark plug initiate the combustion reaction?

Compression and ignition


How does an engine have a chemical reaction?

Combustion is a chemical reaction.


What was petroleum used for?

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Because it operates through the combustion of a fuel and air mixture, and this reaction occurs within the engine block.


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In which step of the four stroke engine cycle does the heat from the combustion reaction cause the pistons to move?

combustion and expansion


In which step of the four-stroke engine cycle does the heat from the combustion reaction cause the pistons to move?

combustion and expansion


Explain what is combustion?

Did you mean combustion? Combustion is the chemical reaction between a fuel and an oxidant which will produce heat. Ex: a camp-fire is a combustion, the gas being burned in the engine of your car is also.


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