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Question
Both the valves of a petrol engine are closed during the ___ .
Both the valves of a petrol engine are closed during the
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Solution
The correct option is C Compression stroke
Compression stroke
The compression stroke is the stroke of an engine in which the air or air/fuel mixture is compressed before ignition. During the compression stroke, the intake valve closes and the piston moves up the cylinder, squeezing the fuel-air mix. At the end of the compression stroke, the spark plug fires the rich mixture in the pre-combustion chamber.
Compression stroke
The compression stroke is the stroke of an engine in which the air or air/fuel mixture is compressed before ignition. During the compression stroke, the intake valve closes and the piston moves up the cylinder, squeezing the fuel-air mix. At the end of the compression stroke, the spark plug fires the rich mixture in the pre-combustion chamber.
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