What is cavitation in a centrifugal pump and how does it affect performance?
Direct Answer
Option D: Formation and collapse of vapor bubbles near impeller causing noise, vibration, and metal erosion
Centrifugal pump cavitation occurs when local static pressure drops below the liquid vapor pressure at the impeller eye. The resulting vapor bubbles collapse violently upon reaching higher pressure zones, generating destructive micro-jets that cause severe pitting, noise, and vibration.
All Options
Detailed Explanation & Context
Centrifugal pump cavitation occurs when local static pressure drops below the liquid vapor pressure at the impeller eye. The resulting vapor bubbles collapse violently upon reaching higher pressure zones, generating destructive micro-jets that cause severe pitting, noise, and vibration.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).
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