Which risk increases when a hydraulic turbine operates below its Net Positive Suction Head (NPSH) requirement?

💡 Explanation

Operating below the NPSH triggers cavitation because local pressure drops below the liquid's vapor pressure, forming vapor bubbles near the impeller. These bubbles collapse, eroding the material. Therefore, accelerated impeller cavitation occurs rather than efficient flow or stability

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• Which effect results when differential vapor pressure in a centrifugal refrigerant pump exceeds design limits?
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