CWEA Maintenance Technologist Practice Test 2025 – The All-in-One Guide to Exam Success!

Preventing water hammer in pumping systems is crucial for maintaining the integrity of piping, pumps, and fittings. The commonly accepted method for mitigating water hammer is through the use of surge tanks or air chambers, which act as buffers in the hydraulic system.

Surge tanks and air chambers are designed to absorb the sudden changes in pressure that occur when fluid flow is rapidly stopped or changed, which is the primary cause of water hammer. When water flow is suddenly interrupted, the momentum of the moving water can create a pressure wave that travels back through the piping, leading to loud banging noises and potential damage. By incorporating surge tanks or air chambers, these devices can dampen the pressure waves, allowing the water to expand or compress within a controlled space, significantly reducing the impact of those sudden pressure changes.

In contrast, while soft start motors can help manage pump operation more smoothly, they do not directly address the pressure fluctuations within the system after flow is stopped. Reducing piping diameter can actually exacerbate pressure conditions and may increase the likelihood of water hammer. Increasing pump speed can lead to higher flow rates and increased hydraulic surges, similarly contributing to the water hammer phenomenon rather than alleviating it.

Thus, utilizing surge tanks or air chambers directly targets the dynamics of fluctu