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Which outcome directly follows increased coolant pump speed in an engine?

A)Increased boundary layer turbulence intensity
B)Decreased system static pressure drop
C)Minimized fluid-film lubrication effectiveness
D)Diminished viscous shear stress magnitude

💡 Explanation

The Reynolds number increases with fluid velocity, leading to increased *boundary layer transition*, because higher Reynolds numbers mean inertial forces dominate viscous forces. Therefore turbulence increases, rather than laminar flow, under higher velocities generated inside narrow cooling system geometries.

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