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← TechnologyWhich risk is amplified during extended engine idling?
A)Crankshaft oil film rupture✓
B)Turbocharger overspeed failure
C)Fuel injector nozzle coking
D)Piston ring thermal runaway
💡 Explanation
Extended idling causes lower oil pressure; this causes thinner hydrodynamic lubrication via the journal bearing mechanism between the crankshaft and connecting rods in the absence of greater centrifugal force. Therefore, higher wear occurs, rather than turbocharger or injector issues under low-load operation.
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