Friction loss is affected by three factors. What is one of those?

• A. Incident elevation
• B. Hose diameter
• C. Atmospheric pressure
• D. Nozzle type

Answer: (B)

Friction loss in a fire hose is influenced by the diameter of the hose, which directly affects how water flows through it. A larger diameter hose reduces friction loss because it offers a wider pathway for the water, allowing it to flow more freely and with less resistance. Conversely, a smaller diameter hose increases friction loss due to the increased resistance the water encounters as it moves through a narrower opening.

Understanding this concept is crucial for firefighters when calculating water flow and pressure needs at a fire scene. By selecting the appropriate hose diameter, firefighters can optimize water delivery, ensuring that sufficient pressure is maintained to effectively combat fires. This factor is a fundamental principle in fluid dynamics and plays a significant role in firefighting operations.