Ace the Wastewater Grade 4 Exam 2026 – Dive into Success and Flow with Confidence!

Question: 1 / 565

What happens when a valve is closed too quickly?

A decrease in pressure

A pressure surge in the line

When a valve is closed too quickly, it can cause a pressure surge in the line, which is commonly referred to as water hammer. This phenomenon occurs because the rapid closure of the valve creates a sudden change in the flow velocity of the fluid, leading to a shockwave that travels through the piping system.

The pressure surge can result in significant forces acting on the pipe walls, potentially causing damage, creating noise, or even leading to leaks or ruptures if the system is not designed to withstand such pressures. Proper valve operation is crucial to maintain stable fluid dynamics and avoid these sudden spikes in pressure. Thus, understanding the consequences of rapid valve closure is essential for maintaining the integrity and safety of a wastewater system.

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Fluid backflow

Noise reduction in the system

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