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Which consequence results when the impeller's rotational speed increases beyond design in a centrifugal pump operating as an engine?

A)Cavitation erosion rapidly damages surfaces.
B)The system enters hydrodynamic lubrication.
C)A thicker boundary layer becomes dominant.
D)Viscosity's effects proportionally decrease largely.

💡 Explanation

Cavitation erosion emerges because elevated impeller speeds intensely reduce local pressure causing the vaporisation of the fluid; therefore, vapour bubbles accelerate leading collapsing and material damage, rather than hydrodynamic lubrication.

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