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Adapter
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Fitting for connecting hose couplings with dissimilar threads but with the same inside diamter.
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Aerial Fuels
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Standing and supported live and dead combustibles not in direct contact with the ground and consisting mainly of foliage, twigs, branches, stems, cones, bark and vines.
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A-Frame Collapse
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Pattern of collapse that occurs when the floor and/or roof assemblies on both sides of a center wall collapse into what might be seen as opposing lean-to collapses. This pattern offers a good chance of hapitable void spaces on both sides of the center wall.
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Air-Aspirating Foam Nozzle
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Foam nozzle especially designed to provide the aeration required to make the highest quality foam possible; most effective appliance for the generation of low-expansion foam.
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All Clear
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Signal given to the Incident Commander that a specific area has been checked for ictims and none have been found or all found victims have been extricated from an entrapment.
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Ambient Temperature
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Temperature of the surrounding environment.
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Aqueous Film Forming Foam
(AFFF) |
Synthetic foam concentrate that, whencombined with water, can form a complete vapor barrier over fuel spills and fires and is a highly effective extinguishing and blanketing agent on hydrocarbon fuels. Also called light water.
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Arc
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A luminous discharge of electricity across a gap. Arcs produce very high temperature.
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Asphyxiation
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Condition that causes death because of a deficient amount of oxygen and an excessive amount of carbon monoxide and/or other gases in the blood.
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A-Tool
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A prying tool with a sharp notch with cutting edges machined into it. The notch resembles the letter A. This tool is designed to cut behind the protective collar of a lock cylinder and maintain a hold so that the lock cylinder can be pried out.
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Autoignition
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Ignition that occurs when a substance in air, whether solid, liquid, or gaseous, is heated sufficiently to initiate or cause self-sustained combustion without an external ignition source.
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Autoignition Temperature
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Same as ignition temperature except that no external ignition source is required for ignition because the material itself has been heated to ignition temperature. The temperature at which autoignition occurs through the spontaneous ignition of the gases or vapor given off by a heated material.
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Automatic Location Identification
(ALI) |
Enhanced 9-1-1 feature that displays the address of the party calling 9-1-1 on a screen for use by the public safety telecommunicator. Usually used in tandem with automatic number identification (ANI) services. This feature is also used to route calls to the appropriate public safety answering point (PSAP) and can even store information in its database regarding the appropriate emergency service (police, fire, and medical) that respond to that address.
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Automatic Nozzle
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Fog stream nozzle that automatically corrects itself to provide a good stream at the proper nozzle pressure.
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Axe
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Forcible entry tool having a pick or flat head and a blade attached to a wood or fiberglass handle. Also called a firefighter's axe.
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