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Which risk increases when lubricating oil within an engine reaches a high Reynolds number?

A)Increased thermal conduction
B)Onset of turbulent flow
C)Decreased viscous drag
D)Elevated laminar sublayer

💡 Explanation

Turbulent flow increases because a higher Reynolds number indicates inertial forces dominate over viscous forces, therefore turbulence arises more easily, rather than the smoother laminar flow, resulting in less efficient lubrication and increased engine wear.

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