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Which risk increases when rapid cylinder wall quenching occurs during Direct Injection (DI) operation?

A)Accelerated piston ring wear
B)Increased catalyst light-off duration
C)Elevated risk of valve float
D)Greater thermal stresses on turbine

💡 Explanation

Accelerated piston ring wear happens because cylinder wall quenching promotes increased bore distortion, influencing the lubricant film thickness via scuffing between the rings and bore surfaces, therefore wearing the rings rapidly, rather than directly affecting other processes..

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