What term refers to relay supply hose of 3.5 to 6 inches used to move large volumes of water quickly with a minimum number of pumpers and personnel?

What term refers to relay supply hose of 3.5 to 6 inches used to move large volumes of water quickly with a minimum number of pumpers and personnel?

• A. Large Diameter Hose - LDH
• B. High Rise Building
• C. Centrifugal Pump
• D. Head Pressure

Answer: (A)

Relays in fireground water supply rely on Large Diameter Hose to move big volumes of water quickly with fewer pumpers and personnel. The term refers to hoses in the 3.5 to 6 inch size used specifically for rapid bulk water transfer, where larger diameter reduces the number of hoses and pumpers needed while delivering high flow. This setup is designed to minimize manpower and equipment while maintaining the required water supply. The other options don’t name a hose used for this purpose—one is a building type, another a pump type, and the last a pressure concept—so they don’t apply.

Relays in fireground water supply rely on Large Diameter Hose to move big volumes of water quickly with fewer pumpers and personnel. The term refers to hoses in the 3.5 to 6 inch size used specifically for rapid bulk water transfer, where larger diameter reduces the number of hoses and pumpers needed while delivering high flow. This setup is designed to minimize manpower and equipment while maintaining the required water supply. The other options don’t name a hose used for this purpose—one is a building type, another a pump type, and the last a pressure concept—so they don’t apply.