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Which outcome occurs when a pump operates substantially below its design Reynolds number?

A)Increased impeller cavitation probability occurs
B)Laminar flow regime dominates instead
C)Pump efficiency always increases sharply
D)Viscous forces invariably become negligible

💡 Explanation

Laminar flow regime dominates because, at low Reynolds numbers, inertial forces are less dominant and viscous forces stabilize the flow. Therefore, the flow becomes smoother and more predictable, rather than remaining turbulent, which happens at higher Reynolds numbers.

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