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When a nozzle is connected to a hose and water is ejected, the nozzle must be restrained by an anchor such as the hands of a firefighter. This anchor must apply a force in the direction of the spray, which is called the nozzle reaction. The magnitude of the nozzle reaction is the jet momentum flow rate, = /,
High-rise pack Hose bundle prepared for carrying to a standpipe in a high-rise building, usually consisting of 50 or more feet of 1¾-inch hose and a combination nozzle. Hook forged steel hook at end of insulated pole of varying lengths; used for piercing and pulling building materials away from walls and ceilings. Similar to nautical gaff hook.
A fog nozzle. A fog nozzle is a firefighting hose spray nozzle that breaks its stream into small droplets.By doing so, its stream achieves a greater surface area, and thus a greater rate of heat absorption, which, when compared to that of a smoothbore nozzle, speeds its transformation into the steam that smothers the fire by displacing its oxygen.
5-inch (13 cm) flex suction hose with Storz fittings, mounted on an engine. Flexible suction hose (Flex suction or suction hose), not to be confused with hard suction hose in U.S., is a specific type of fire hose used in drafting operations, when a fire engine uses a vacuum to draw water from a portable water tank, pool, or other static water source.
A conical hose-stream aimed around an opening—of a window or door, etc.—entrains smoke and thus increases the exhaust rate of smoke from the space. This is a process called hydraulic ventilation. This strategy might be used when the fire is small and protecting property from smoke damage can be achieved safely.
9-Pattern Revolver Garden Hose Nozzle. Key Specs. Dimensions (H x W x D): 8 x 7 x 6 inches. Main Materials: Metal; ABS plastic. Spray Patterns: 9. This heavy-duty, value-packed garden hose nozzle ...
High-rise building: Any building taller than three or four stories, depending upon local usage, requiring firefighters to climb stairs or aerial ladders for access to upper floors. High-rise pack: A shoulder load of hose with a nozzle and other tools necessary to connect the hose to a standpipe. Hook ladder: Short ladder with a long hook at the ...
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