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← TechnologyWhich risk increases when uneven connecting rod bearing wear alters crankshaft journal alignment?
A)Harmonic vibration exciting resonant frequencies✓
B)Increased oil viscosity hindering lubrication
C)Elevated NOx emissions exceeding limits
D)Fuel injector malfunction causing lean condition
💡 Explanation
When uneven connecting rod bearing wear misaligns the crankshaft journals, harmonic vibration occurs because the rotating mass becomes unbalanced, exciting resonant frequencies within the engine block. Therefore harmonic vibration results, rather than viscosity increase, NOx changes, or fuel injector malfunctions which stem from unrelated mechanical or chemical processes.
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