Piston engine · Question 1 of 12
In which order do the strokes of a four-stroke piston engine take place?
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Answer
- B Intake, compression, power, exhaust
Explanation
In the first stroke the piston draws in the mixture, in the second it compresses it. Shortly before top dead centre the spark plug fires, and combustion drives the piston down in the power stroke. In the fourth stroke it pushes out the exhaust gases. The crankshaft turns twice for one complete cycle.