Which term refers to a water supply line that enables rapid movement of water to a fire scene with minimal crew?

Which term refers to a water supply line that enables rapid movement of water to a fire scene with minimal crew?

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

Answer: (C)

The concept being tested is delivering large volumes of water quickly from the source to the fire scene with a line designed for high flow. Large Diameter Hose (LDH) fits this purpose best. LDH is a heavy, large-bore hose used to shuttle substantial water amounts from hydrants or other sources to the pumper or directly to the attack activity. Its size allows higher flow with less friction loss per unit of water, so you can move more water with fewer hoses and less crew than with smaller attack lines. In practice, you’d lay LDH from a hydrant to the pump or transfer point, then the engine can push that water toward the scene, enabling a rapid water supply. The other terms don’t describe the supply line itself: a high rise building is a building type, not a hose; a centrifugal pump is the device that moves water and increases pressure, not the supply line; and a pressure maintenance pump is used to keep pressure in an already established supply, not to provide the initial rapid delivery of water.

The concept being tested is delivering large volumes of water quickly from the source to the fire scene with a line designed for high flow. Large Diameter Hose (LDH) fits this purpose best. LDH is a heavy, large-bore hose used to shuttle substantial water amounts from hydrants or other sources to the pumper or directly to the attack activity. Its size allows higher flow with less friction loss per unit of water, so you can move more water with fewer hoses and less crew than with smaller attack lines. In practice, you’d lay LDH from a hydrant to the pump or transfer point, then the engine can push that water toward the scene, enabling a rapid water supply.

The other terms don’t describe the supply line itself: a high rise building is a building type, not a hose; a centrifugal pump is the device that moves water and increases pressure, not the supply line; and a pressure maintenance pump is used to keep pressure in an already established supply, not to provide the initial rapid delivery of water.