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← TechnologyWhich risk increases when unbalanced moments in an engine crankshaft induce excessive precession?
A)Bearing fatigue accelerates sharply✓
B)Injector timing drifts erratically
C)Valve float occurs prematurely
D)Turbocharger efficiency drops rapidly
💡 Explanation
Increased precession from unbalanced crankshaft moments causes harmonic motion. This induces resonant vibration via mechanical resonance, accelerating surface fatigue in bearings because stress cycles increase therefore weakening their load-bearing capacity rather than affecting unrelated systems like injectors or turbochargers.
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