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← TechnologyWhich risk increases when lubricating oil supply to an automotive turbocharger is interrupted under high load?
A)Compressor blade fatigue from surge
B)Bearing failure from oil film breakdown✓
C)Intercooler icing from pressure drop
D)Wastegate malfunction from thermal stress
💡 Explanation
When oil supply to a turbocharger is interrupted, boundary lubrication conditions occur because the oil film between the shaft and bearing is lost, generating friction, heat and wear. Therefore bearing failure results, rather than surge, icing or wastegate malfunctions, which depend on separate airflow or thermal mechanisms.
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