To prevent water hammer, nozzle controls and related components should be operated how?

To prevent water hammer, nozzle controls and related components should be operated how?

• A. Slowly
• B. Quickly
• C. With full flow
• D. In pulses

Answer: (A)

Water hammer is the shock wave that travels through piping when flow is changed abruptly. To prevent it, operate nozzle controls and related components slowly. A gradual opening lets pressure adjust in steps rather than slam the system, reducing the risk of hose rupture, valve or pump damage, and injury. In practice, crack the nozzle to start flow, then smoothly open to full, and when finishing, ease it closed rather than snapping shut. Rapid actions or pulsing flow create pressure surges, making water hammer more likely, so the steady, slow operation is the safest and most effective approach.

Water hammer is the shock wave that travels through piping when flow is changed abruptly. To prevent it, operate nozzle controls and related components slowly. A gradual opening lets pressure adjust in steps rather than slam the system, reducing the risk of hose rupture, valve or pump damage, and injury. In practice, crack the nozzle to start flow, then smoothly open to full, and when finishing, ease it closed rather than snapping shut. Rapid actions or pulsing flow create pressure surges, making water hammer more likely, so the steady, slow operation is the safest and most effective approach.