What is the general flow range of a 1¾" (45-mm) attack hose?

The choice indicating that the general flow range of a 1¾" (45-mm) attack hose is 80 to 200 gpm (303 to 757 lpm) is correct because this range is widely accepted for this size of hose in standard firefighting operations. The 1¾" hose is designed for initial attack lines, allowing firefighters to deliver sufficient water to combat fires effectively within residential and commercial structures.

In practice, this flow range facilitates a balance between adequate pressure, manageable weight, and sufficient water delivery to extinguish fires. The lower end of the range (80 gpm) is suitable for use in smaller incidents or when using certain nozzles that maintain sufficient handline control, while the upper end (200 gpm) allows for aggressive suppression efforts when facing larger or more involved fires.

Overall, using this flow range ensures that firefighters can effectively adapt to varying conditions on the fireground, making it an essential parameter for anyone training or working in firefighting roles.