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A load of hose on a pumper, but not connected to a pump outlet. Often used for larger supply lines.
Dead Man Zone
Unburnt areas around edges of brush fire.
A master stream device mounted to top deck of pumper.
An explosion with a propagation front traveling at subsonic speeds, as compared to supersonic detonation.
A master stream device that can be positioned on the ground based on the need of the incident commander.
Type of sprinkler system in which sprinkler heads do not have individual valves, and the water (or other extinguishing agent) is disbursed from all sprinkler heads simultaneously when a central (or zoned) valve is triggered by a sensor (or manually). Typically reserved for industrial areas where rapid fire spread must be prevented at the cost of damaging non-burning materials.
Demobilization, or a crew being removed from working a fire.
Denver Door opener
Heavy pry bars connected with a hinge, one with an adjustable foot, used for prying open doors.
Denver tool (also called TNT tool)
A combination axe, sledgehammer, pry tool, ram, and D-handle pull tool used to gain forcible entry to buildings, automobiles, etc. during emergency situations.
See Alarm system.
See Aqueous Film Forming Foam.
Any treatment applied directly to burning fuel such as wetting, smothering, or chemically quenching the fire or by physically separating the burning from unburned fuel.
Putting the wet stuff on the red stuff." A form of fire attack in which hoses are advanced to the fire inside a structure and hose streams directed at the burning materials.
The amount of water flowing from a fire hydrant when it is opened; compare to static flow and residual flow.
Refers to person or place designated for handling a call for help by alerting the specific resources necessary.
Portion of fire hydrant or sprinkler system connecting main loops to smaller loops where outlets are located.
Firehose adapter for connecting two male" couplings together; may also adapt different sizes on either side.
Hose coupling adapter with two male-threaded connectors back-to-back; used for connecting two female couplings together.
Fireline constructed by the front blade of a bulldozer or any tracked vehicle with a front mounted blade used for exposing mineral soil. Also catline.
The process of pumping water from a static source below the pump.
Using a suction pump to lift water from below the pump, using a semi-rigid suction hose, typically to fill a portable reservoir that has other suction pumps (to relay) or siphon hoses running downhill to their nozzles.
Training during which an emergency is simulated and the trainees go through the steps of responding as if it were a real emergency.
Hand-carried fire-starting device filled with flammable liquid that is poured across a flaming wick, dropping flaming liquid onto the fuels to be burned.
A fire extinguishing agent. It works by breaking the chemical chain reaction in the fire tetrahedron".
A fire hydrant with a valve located at the bottom of the barrel, near the water main. The barrel of the hydrant remains dry until used. The prevents the hydrant from freezing in sub-zero temperatures. A dry hydrant is also an unpressurized pipe that can be used to draft water from a pond or lake.
Fire extinguishing agents for use on flammable metals. Each agent is typically designed for use on either a single metal or very similar metals.
A sprinkler system having pressurized air (rather than water) in the distribution pipes until a heat-activated sprinkler head opens and releases the pressure, which opens a water valve (and possibly an accelerator valve) to flow water to the open head; used where the protected premises are not heated during freezing temperatures or where pressurized water in overhead sprinkler pipes could create another hazard.
Layer of decaying forest litter consisting of organics such as needles, leaves, plant and tree materials covering the mineral soil. Duff can smolder for days after a fire. Extinguishing smoldering duff is key to successful mopup operations.