Which outcome is caused by exceeding the Net Positive Suction Head Required (NPSHr) in a submerged-volute pump?

💡 Explanation

When the Net Positive Suction Head Available (NPSHa) is less than the NPSHr, cavitation occurs because the pressure drop is too large relative to the vapor pressure causing bubbles to form and collapse at the impeller eye leading to erosion. Therefore, pump failure occurs, rather than vibration, overheating, or seal wear which involve different mechanisms and failure conditions.

• Which outcome results from channel length modulation in MOSFETs?
• Which outcome occurs when thermal noise overcomes the coded signal in a satellite communication channel?
• Which outcome results when a refrigeration system uses a refrigerant with larger molecule size?
• In a high-speed hydraulic actuator, which risk increases dramatically with an improperly sized inlet?
• Which consequence results when a fly-by-wire flight control hydraulic actuator seal degrades?
• Which outcome occurs when dissolved air accelerates cavitation damage in a marine hydraulic actuator?