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← ScienceWhich consequence results when reciprocating engines experience insufficient oil film?
A)Increased frictional power loss✓
B)Detonation intensity will decrease
C)Fuel efficiency temporarily improves
D)Reduced exhaust emission opacity
💡 Explanation
Insufficient oil prevents hydrodynamic lubrication; boundary lubrication causes increased friction reducing power output through viscous shear. This is because mechanical energy dissipates as heat; therefore frictional losses increase, rather than combustion improvement under starved conditions.
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