CDC Mobile Water Supply Practice Test 2025 - Free Practice Questions and Study Guide

The purpose of using different hose sizes in water supply systems primarily revolves around managing flow rates and friction loss. Each hose size affects the volume of water that can be transported through it and the resistance the water meets as it flows. Larger diameter hoses can carry more water at a lower velocity, which reduces the amount of friction loss. This is essential for maintaining sufficient pressure and flow during firefighting or other water supply operations, where efficient water delivery is crucial.

Using various hose sizes allows for flexibility depending on the situation, ensuring that the water supply remains effective while minimizing unnecessary strain on the system. Smaller hoses, while easier to handle and lighter to carry, can increase friction loss when more water is needed. Thus, understanding the implications of hose size on flow rate and friction loss is key to optimizing water supply operations.