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Which failure mode is accelerated when a turbocharged engine experiences overspeed?

A)Bearing wear due to oil starvation
B)Increased injector nozzle carbon buildup
C)Catalytic converter thermal breakdown
D)Piston ring to cylinder wall galling

💡 Explanation

Excessive rotational speed in turbochargers increases centrifugal forces, leading to **creep deformation** of its bearings. This occurs because the material yields under sustained high stress, therefore bearing wear accelerates due to oil starvation, rather than damage to fuel injectors or catalytic converters.

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