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What is the correct sequence of strokes in four stroke cycle engines?

(a) Compression, Suction, Exhaust, Power

(b) Power, Suction, Exhaust, Compression

(c) Suction, Compression, Power, Exhaust

(d) Suction, Power, Compression, Exhaust

I got this question in a national level competition.

This intriguing question comes from Working Principles of I.C Engine topic in division Internal Combustion Engine of Farm Machinery

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Right choice is (c) Suction, Compression, Power, Exhaust

For explanation I would say: The intake valves are open as a result of the cam lobe pressing down on the valve stem. The piston moves downward increasing the volume of the combustion chamber and allowing an air fuel mixture. This step is known as suction. The charge taken in the cylinder is compressed during the compression stroke. During power stroke, the high pressure developed due to combustion of fuel causes the piston to be forced forward or backward at regular intervals. Exhaust gases go out through exhaust valves during exhaust stroke.

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