IAAI-FIT TEST VOCAB COMPLETE SOLUTION UPDATED 2023/2024 Approved - acceptable Absolute Temperature - a temperature measured in Kelvins (K) or Rankines (R) Accelerant - a fuel or oxidizer intention used to initiate a fire or increase its spread

IAAI-FIT TEST VOCAB COMPLETE SOLUTION UPDATED 2023/2024 Approved - acceptable Absolute Temperature - a temperature measured in Kelvins (K) or Rankines (R) Accelerant - a fuel or oxidizer intention used to initiate a fire or increase its spread Accidental Fire - an unplanned fire or a chance occurrence arising from unintentional circumstances Active Fire Protection System - a mechanical or electric system that activates under fire circumstances (ex. detectors and sprinklers) Ambient - something/someones surrounding environment Ampacity - the maximum current in amperes that a conductor can continuously carry without going over it's max temperature rating Ampere - a unit of electric current equivalent to 1 coulomb (6.24x1018 electrons) per second Arc - a high-temperature, glowing electric particle (spark) discharged across a circuit gap or through a fuel Arc Mapping - evaluating circuit configurations for information about what might have caused the fire Arc Site - the location on a conductor that receives damage from arcing Arcing through char - when arcing is conducted through char Area of Origin - the geographic location of a fire scene in which the point of origin is located Arrow Pattern - a fire pattern on the cross section of burned wooden structural components, looks like a triangle with the bottom being most burned out and the top being least burned out Arson - the crime of maliciously or intentionally starting a fire or explosion Autoignition - heated combustion without a spark or flame Autoignition Temperature - lowest temperature that a material can start ignition spontaneously Backdraft/Smoke Explosion - a deflagration explosion caused by adding oxidation to an oxygen deficient fire Bead - a blob of re-solidified metal that was melted by arcing at the end of circuit conductor remains Blast Pressure Front - the high pressure leading edge of explosion that causes damage by pushing out and displacing the normal ambient pressure BLEVE - Boiling Liquid Expanding Vapor Explosion Bonding - the permanent joining of metal parts that creates a conductive and continuous (safe) path for electrical currents British Thermal Unit (BTU) - a unit of energy, 1055 joules of energy Calcination of Gypsum - the release of chemically bound water from gypsum by fire that results in a pattern (looks like different levels of normal wall burn damage, see fire patterns section) Calorie - a unit of energy, 4.184 joules of energy Cause - the circumstances, conditions and agents that brought about a fire or explosion and its affects Ceiling jet/Ceiling layer/Upper layer - : the thin layer of hot gases that forms in the top of a room as a result of convective heat pushing up Char - carbon material that has been burned to the point of blackening Char blisters - the alligator skin looking pattern/cracks on burned carbon materials Clean burn - areas in which fire temperature either burned away soot or prevented soot deposits from forming Combustible - capable of undergoing combustion Combustible Gas Indicator - equipment that indicates the presence of ignitable vapors (sniffer Combustible liquid - a liquid with a flashpoint between 100-200℉ Combustion - the process of oxidation occurring at a fast enough rate to produce high enough heat for ignition different than fire? Combustion products - the heat, gas, debris, etc. generated by combustion Competent Ignition Source - an ignition source that has 1) sufficient energy, and 2) is capable of transferring that energy to a fuel source for 3) a long enough duration to bring the fuel to ignition temperature Conduction - heat transfer through direct contact Convection - heat transfer through air flow Current - a flow of electric charge Deductive reasoning - the process of drawing conclusions through logical inferences Deflagration - a low order combustion explosion in which the flaming front velocity is less than the speed of sound (big fire, no boom) Density - mass per unit of volume Detonation - the faster than the speed of sound initiation of the spread of combustion Diffuse Fuel - ignitable/combustible fuels that hang in the air and can carry the flame front (gases, particles, vapors, etc.) Diffusion flame - a flame in which the fuel and air are separate and must combine with a heat source to burn (ex. With a candle the wax is separate from the air, but then once wax vaporizes and mixes with the air it ignites) Drop down/Fall Down - the spread of fire through the falling of burning material Effective fire temperatures - when temperatures reach certain threshold to do certain kinds of damage Electric spark - a small particle of energy released in arcs Empirical data - physical right in front of you data, not deductive Energy - a property of matter manifested by moving an object against a force or transferring heat Entrainment - the process of a fire sucking things in to breath Explosible - a material with a pressure ratio (maximum pressure/pressure at ignition) of 2+, or just capable of exploding Explosion - the sudden change of potential energy into kinetic energy caused by the release of gas under pressure Explosion Dynamics - how chemistry, physics, fire science, fluid and solid mechanics and heat transfer interact to influence explosion behavior Explosive - any chemical, mixture or device that explodes Explosive material - any material that can act as a fuel for an explosion Exposed Surface - the side of something that was directly exposed to the fire