Which two parts of the engine are involved in combustion?

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Multiple Choice

Which two parts of the engine are involved in combustion?

Explanation:
Combustion happens in the combustion chamber, which is formed by the space between the cylinder walls and the cylinder head. The cylinder provides the bore where the piston moves and compresses the air–fuel mixture, while the cylinder head closes the top of that chamber and houses the spark plug and valves that enable ignition and flow. Together, the cylinder and cylinder head define where the combustion occurs. Spark plugs ignite the mixture, and the piston converts the expanding gas into mechanical work, but they don’t form the combustion chamber itself.

Combustion happens in the combustion chamber, which is formed by the space between the cylinder walls and the cylinder head. The cylinder provides the bore where the piston moves and compresses the air–fuel mixture, while the cylinder head closes the top of that chamber and houses the spark plug and valves that enable ignition and flow. Together, the cylinder and cylinder head define where the combustion occurs. Spark plugs ignite the mixture, and the piston converts the expanding gas into mechanical work, but they don’t form the combustion chamber itself.

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