Cavitation involves vapor bubbles collapsing and generating what effect in the discharge line?

• A. Tremendous force through the discharge line
• B. Mild heat generation
• C. Reduced vapor pressure
• D. Increased oil viscosity

Answer: (A)

Cavitation happens when local flow conditions drive the liquid pressure below its vapor pressure, forming bubbles. When conditions rise again, those bubbles collapse with great energy, sending a sharp pressure pulse through the fluid. That rapid, high-energy collapse translates into a tremendous force transmitted along the discharge line. It’s this strong mechanical impulse, not heat or viscosity changes, that characterizes the discharge-line effect of cavitation. The other options describe either the cause (reduced vapor pressure) or effects that aren’t the primary impact in the line (mild heat, increased oil viscosity).