2024/25 NFPA 921 Definitions set study guide verified 100% new!!

2024/25 NFPA 921 Definitions set study guide verified 100% new!! 1. NFPA 1033 Stan- dard for Profes- sional Qualifica- tions for Fire In- vestigator 2. NFPA 921: Guide for Fire and Ex- plosion Investi- gations Facilitates safe, accurate investigations by specifying the job performance requirements (JPRs) necessary to per- form as a fire investigator in both the private and public sectors. Guide for Fire and Explosion Investigations", is a peer reviewed document that is published by the National Fire Protection Association (NFPA). Its purpose is "to estab- lish guidelines and recommendations for the safe and systematic investigation or analysis of fire and explosion incidents" (section 1.2.1). Familiarity with NFPA 921 is strongly recommended by National Association of Fire Investigators and the International Association of Arson Investigators (IAAI). NFPA 921 forms a large basis of the information which a professional fire investigator must know to pass the various Fire Investigator Certification (NAFI and IAAI) examinations. 3. Spoliation is the destruction or alteration of evidence through inten- tion or ignorance. 4. Qualification The National Fire Protection Association (NFPA), through a document known as NFPA 1033, Standard for Pro- fessional Requirements for Fire Investigator, publishes minimum requirements for the knowledge skills and ability of a fire investigator. Principal among these is a 16-point list of areas in which a fire investigator is required to have education beyond high school level. These 16 topics are: Fire science Fire chemistry Thermodynamics Thermometry Fire dynamics Explosion dynamics Computer fire modeling Fire investigation Fire analysis 5. Witnesses infor- mation and/or Electronic Data Fire investigation methodology Fire investigation technology Hazardous materials Failure analysis and analytical tools The analysis of observations reported by persons who witnessed the fire or were aware of conditions present at the time of the fire as well as the analysis of electronic data such as security camera, footage, alarm system activation, or other such data recorded in and around the time of the fire event 6. Fire Patterns The analysis of effects and patterns left by the fire 7. ARC Mapping The analysis of the locations where electrical arcing has caused damage and the documentation of the involved electrical circuits 8. Fire Dynamics The analysis of the fire dynamics[i.e., the physics and chemistry of fire initiation and growth and the interaction between the fire and the buildings system 9. Code A standard that is an extensive compilation of provisions covering broad subject matter or that is suitable for adop- tion into law independently of other codes and standards. 10. Standard An NFPA standard, the main text of which contains only mandatory provisions using the word "shall" to indicate requirements and that is in a form generally suitable for mandatory reference by another standard or code or for adoption into law. Includes all NFPA standards, including codes, standards, recommended practices and guides. 11. Absolute Tem- perature A temperature measured in Kelvins or Rankines 12. Accelerant A fuel or oxidizer, often an ignitable liquid, intentionally used to initiate a fire or increase the rate of growth or spread of fire. 13. Accident An unplanned event that interrupts an activity and some- times causes injury or damage or a chance occurrence arising from unknown causes; an unexpected happening due to carelessness, ignorance, and the like. 14. Active Fire Pro- tection System A system that uses moving mechanical or electrical parts to achieve a fire protection goal 15. Ambient Someone's or something's surroundings, especially as they pertain to the local environment; for example, ambi- ent air and ambient temperature. 16. Ampacity The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without Exceeding its temperature rating. 17. Ampere The unit of electric current that is equivalent to a flow of one coulomb per second, one coulomb is defined as 6.24 x 10 18th power electrons 18. Arc High temperature luminous electric discharge across a gap or through a medium such as charred insulation. 19. Arc Mapping The systematic evaluation of the electrical circuit configu- ration, spatial relationship of the circuit components and Identification of electrical arc sites to assist in the identifi- cation of the area of origin and analysis of the fire spread 20. Arc Site That location on the conductor with localized damage that resulted from an electrical arc. 21. Fire and Energy Fire is a rapid oxidation process, which is an exothermic chemical reaction, resulting in the release of heat and light energy in varying intensities. 22. Arcing through Char 23. Area of Origin Arcing associated with a matrix of charred material (e.g., charred conductor insulation) that acts as a semiconduc- tive medium. 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. (See also 3.3.142, Point of Origin.) 24. Arrow Patterns A fire pattern displayed on the cross- section of a burned wooden structural member. 25. Arson The crime of maliciously and intentionally, or recklessly, starting a fire or causing an explosion. 26. Autoignition Initiation of combustion by heat but without a spark or flame. 27. Auto ignition Temperature The lowest temperature at which a combustible material ignites in air without a spark or flame. 28. Backdraft A deflagration resulting from the sudden introduction of air into a confined space containing oxygen- deficient products of incomplete combustion. 29. Bead A rounded globule of re-solidified metal at the end of the remains of an electrical conductor that was caused by arcing and is characterized by a sharp line of demarcation between the melted and unmelted conductor surfaces. 30. Blast Pressure Front The expanding leading edge of an explosion reaction that separates a major difference in pres sure between normal ambient pressure ahead of the front and potentially dam- aging high pressure at and behind the front. 31. BLEVE Boiling liquid expanding vapor explosion. 32. Bonding The permanent joining of metallic parts to form an elec- trically conductive path that ensures electrical continuity 2024/25 NFPA 921 Definitions set study guide verified 100% new!! 2024/25 NFPA 921 Definitions set study guide verified 100% new!! 2024/25 NFPA 921 Definitions set study guide verified 100% new!!