Remember to think of the 5 inch hose as an above ground water main, that moves the water to the fire with very little friction loss and you will use the hose to its best capability

• A. True
• B. False
• C. Sometimes
• D. Not sure

Answer: (A)

Think of the 5-inch hose as a large-diameter supply line, like an above-ground water main. Its big bore means much lower friction loss for the same flow compared to smaller hoses, so it can move large volumes of water from the hydrant or through relay with less pressure drop. Because of that, you want to use it to its full capability for water supply—lay it out in efficient, straight runs, connect it properly, and push the required GPM toward the attack line with minimal loss. This maximizes the water you can deliver to the fire without over-stressing the pump.

False would ignore the hose’s purpose as a high-capacity supply line. Sometimes or Not sure are vaguer and don’t reflect the reliable behavior of LDH in typical firefighting operations.