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← TechnologyWhich risk increases when internal combustion engine piston's ring gap tolerances exceed design specifications during thermal expansion?
A)Reduced compression leading to misfires
B)Increased oil consumption from blow-by✓
C)Elevated exhaust emissions of hydrocarbons
D)Cylinder wall scoring from ring flutter
💡 Explanation
When piston ring gap tolerances are too large, blow-by increases because combustion gases leak past the rings into the crankcase. Therefore, increased oil consumption is expected over alternatives, due to oil mixing with combustion gases and being burned which needs proper ring sealing.
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