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    Question

    In internal combustion engines, which process occurs

    during the power stroke?
    A Compression of air Correct Answer Incorrect Answer
    B Exhaust gas release Correct Answer Incorrect Answer
    C Air-fuel intake Correct Answer Incorrect Answer
    D Combustion and expansion Correct Answer Incorrect Answer
    E Valve clearance adjustment Correct Answer Incorrect Answer

    Solution

    During the power stroke, the air-fuel mixture combusts, resulting in rapid gas expansion. This pushes the piston downward, producing the mechanical power that drives the engine.

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