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Technician a says the otto cycle gasoline engine has four strokes per cycle technician b say that crankshaft makes four revolutions during four stroke cycle who is right?
Technician A is correct.
The crankshaft must revolve two times to complete one cycle, which as 4 strokes. One half revolution for each stroke.
Intake, compression, combustion, exhaust = four strokes to complete a cycle.
One half revolution for each stroke of the piston going up or down.
Look at a diagram and you'll see this is pretty simple.
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