Alabama Grade II Water Operator Practice Test 2026 - Free Water Operator Exam Practice Questions and Study Guide

Cavitation in pumps is a significant issue that arises when the local pressure in a fluid drops below its vapor pressure, causing the formation of vapor bubbles. As these bubbles travel through the pump and enter higher pressure areas, they implode violently, leading to physical damage to the pump components. This damage can manifest as pitting or erosion on the impeller and casing, which ultimately affects the pump's performance, lifespan, and reliability.

While cavitation does not lead to increased efficiency, reduced flow rate, or lower power consumption, it directly causes wear and tear on the pump, necessitating repairs or replacement. Understanding this phenomenon is crucial for water operators to maintain optimal pump performance and prevent costly damage.