What best describes the role of 5 inch LDH when used to move water to a fire?

What best describes the role of 5 inch LDH when used to move water to a fire?

• A. To deliver water with high friction loss
• B. To deliver water with very little friction loss
• C. To impede water delivery
• D. To saturate surrounding ground

Answer: (B)

The main idea is that large-diameter hose (5 inch LDH) is used to move water to a fire with minimal pressure loss as it travels long distances. Because the hose is bigger, it carries a high volume of water while keeping friction losses low, so the pump can deliver the needed flow to the scene without dropping pressure excessively. This makes it ideal for long supply runs from hydrants or pumpers to the fire attack lines. It isn’t about creating high friction, impeding delivery, or soaking the ground; its purpose is to maximize efficient water transfer to the nozzle by reducing resistance along the supply line.

The main idea is that large-diameter hose (5 inch LDH) is used to move water to a fire with minimal pressure loss as it travels long distances. Because the hose is bigger, it carries a high volume of water while keeping friction losses low, so the pump can deliver the needed flow to the scene without dropping pressure excessively. This makes it ideal for long supply runs from hydrants or pumpers to the fire attack lines. It isn’t about creating high friction, impeding delivery, or soaking the ground; its purpose is to maximize efficient water transfer to the nozzle by reducing resistance along the supply line.