Which of the following are common symptoms of cavitation?

• A. Quiet operation with steady discharge
• B. Increased color change of liquid
• C. A lot of noise and vibration, possibly with hot, erratic discharge and flow
• D. No change in temperature

Answer: (C)

Cavitation shows up most clearly as a lot of noise and vibration, often with hot, erratic discharge and flow. This happens because vapor bubbles form where pressure dips and then violently collapse, sending shock waves into the liquid. That collapse disturbs the flow and creates strong acoustic noise and mechanical vibration, and the energy release can make the discharge feel irregular and even locally hotter. The other descriptions don’t reflect those energetic bubble collapses and the resulting flow disturbances, so they don’t match what cavitation typically looks like.