LATEST FIRE INVESTIGATOR EXAM WITH VERIFIED 100% SOLUTIONS

Absolute Temperature - ANSWER A temperature measured in Kelvins (K) or Rankins (R) Accelerant - ANSWER A fuel or oxidizer, often an ignitable liquid, intentionally used to initiate a fire or increase the rate of growth or spread of fire. Ambient - ANSWER Someone's of something's surroundings especially as they pertain to the local environment. Ambient Air Ambient Temperature Ampacity - ANSWER The maximum current, in amperes, that a conductor can carry under conditions of use without exceeding its temperature rating. Ampere - ANSWER The unit of electric current that is equivalent to a flow of one coulomb per second. Arc - ANSWER A high-temperature luminous electric discharge across a gap or through a medium such as charred insulation. Arc Site - ANSWER The location on a conductor with localized damage that resulted from an electrical arc. Arcing Through Char - ANSWER Arcing associated with a matrix of charred material that acts as a semiconductor medium. Area of Origin - ANSWER A structure, part of a structure, or general geographic location within a fire scene, in which the "point of origin" of a fire or explosion is reasonably believed to be located. Arrow Pattern - ANSWER A fire pattern displayed on the cross-section of a burned wooded structural member. Arson - ANSWER The crime of maliciously and intentionally, or recklessly, starting a fire or causing an explosion. Autoignition - ANSWER Initiation of combustion by heat but without a spark or flame. Autoiginition Temperature - ANSWER The lowest temperature at which a combustible material ignites in air without a spark or flame. Backdraft - ANSWER A deflagration resulting from the sudden introduction of air into a confined space containing oxygen deficient products of incomplete combustion. Bonding - ANSWER The permanent joining of metallic parts to form an electrically conductive path that ensures electrical continuity and the capacity to conduct safely any current likely to be imposed. British Thermal Unit (BTU) - ANSWER The quantity of heat required to raise the temperature of one pound of water 1 degree F. Calcination of Gypsum - ANSWER A fire effect realized in gypsum products, including wallpaper, as a result of exposure to heat that drives off free and chemically bound water. Calorie - ANSWER The amount of heat necessary to raise 1 gram of water 1 degree C. Ceiling Jet - ANSWER A relatively thin layer of flowing hot gases that develops under a horizontal surface as a result of plume impingement and the flowing gas being forced to move horizontally. Ceiling Layer - ANSWER A buoyant layer of hot gases and smoke produced by a fire in a compartment. Char - ANSWER Carbonaceous material that has been burned or pyrolyzed and has a blackened appearance. Char Blisters - ANSWER Convex segments of carbonized material separated by cracks or crevasses that form on the surface of char, forming on materials such as wood as the result of pyrolysis or burning. Clean Burn - ANSWER A distinct and visible fire effect generally apparent on noncombustible surfaces after combustible layer(s) have been burned away. The effect may also appear where soot has failed to be deposited because of high surface temperatures. Combustible - ANSWER Capable of undergoing combustion. Combustible Gas Indicator - ANSWER An instrument that samples air and indicates whether there are ignitable vapors or gases present. Combustible Liquid - ANSWER Any liquid that has a closed-cup flash point at or above 100 degrees F. Combustion - ANSWER A chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form of either a glow or flame. Combustion Products - ANSWER The heat, gases, volatilized liquids and solids, particulate matter, and ash generated by combustion. Competent Ignition Source - ANSWER An ignition source that has sufficient energy and is capable of transferring that energy to the fuel long enough to raise the fuel to its ignition temperature. Creep - ANSWER The tendency of a material to move or deform permanently to relieve stresses. Current - ANSWER A flow of electric charge. Deductive Reasoning - ANSWER The process by which conclusions are drawn by logical inference from given premises. Deflagration - ANSWER Propagation of a combustion zone at a velocity that is less than the speed of sound. Density - ANSWER The mass of a substance per unit volume, usually specified at standard temperature and pressure The density of water is approximately 1 gram per cubic centimeter. Detonation - ANSWER Propagation of a combustion zone at a velocity grater than the speed of sound. Diffuse Fuel - ANSWER A gas, vapor, dust, particulate, aerosol, mist, fog, or hybrid mixture of these, suspended in the atmosphere, which is capable of being ignited and propagating a flame front. Diffusion Flame - ANSWER A flame in which fuel and air mix or diffuse together at the region of combustion. Effective Fire Temperatures - ANSWER Temperatures reached in fires that produce physical effects that can be related to specific temperature ranges. Empirical Data - ANSWER Factual data that is based on actual measurement, observation or direct sensory experience rather than on theory.