Which condition describes vacuum pockets forming due to low pressure near a centrifugal pump impeller vanes?

Which condition describes vacuum pockets forming due to low pressure near a centrifugal pump impeller vanes?

• A. Cavitation
• B. Static Pressure
• C. Residual Pressure
• D. Direct Pumping System

Answer: (A)

Cavitation is the formation of vacuum pockets in a liquid when the local pressure falls below the liquid’s vapor pressure. In a centrifugal pump, fluid accelerates around the impeller vanes, creating very low pressure on the suction side. If that pressure drops below the liquid’s vapor pressure, tiny vapor bubbles form. As the bubbles move into regions of higher pressure, they collapse violently, generating shock waves that can erode the impeller surfaces, cause noise and vibration, and reduce pump performance. The other terms don’t describe this process: static pressure is just pressure in a stationary fluid, residual pressure isn’t about bubble formation, and a direct pumping system is related to a system arrangement rather than the physical phenomenon.

Cavitation is the formation of vacuum pockets in a liquid when the local pressure falls below the liquid’s vapor pressure. In a centrifugal pump, fluid accelerates around the impeller vanes, creating very low pressure on the suction side. If that pressure drops below the liquid’s vapor pressure, tiny vapor bubbles form. As the bubbles move into regions of higher pressure, they collapse violently, generating shock waves that can erode the impeller surfaces, cause noise and vibration, and reduce pump performance. The other terms don’t describe this process: static pressure is just pressure in a stationary fluid, residual pressure isn’t about bubble formation, and a direct pumping system is related to a system arrangement rather than the physical phenomenon.