Fire Investigator 2nd edition Latest Updated

ANSI Standard Z89.1 -Answer Standard for industrial head protection. The particular toxic gases that may be found at fire and explosion sites vary according to four common factors. -Answer Nature of combustible. Rate of heating. Temperature of the involved gases. Oxygen concentration. The organic vapor/acid gas cartridge is effective for approximately? -Answer 8 to 10 hours of continuous use. Placards are required on containers that are how big? -Answer 640 cubic feet or larger. 704 placard colors -Answer Health Blue Flammability Red Instability Yellow At an explosion scene, the perimeter should be established how far? -Answer A minimum of 1.5 times the distance of the farthest piece of debris found. NFPA 54 -Answer National Fuel Gas Code Combustion -Answer A rapid and self-sustaining chemical process that yields heat and usually light. Complete combustion of methane in air produces? -Answer Heat, light, water vapor, and carbon dioxide. Hydrogen Cyanide (HCN) -Answer Produced in the combustion of materials containing nitrogen. HCN acts to prevent the body from using oxygen at the cellular level. Polyurethane foam. Joule -Answer Equal to 1 Newton over a distance of 1 meter. A BTU is equal to -Answer 1054 joules The rate at which most chemical reactions occur. -Answer Doubles with each 18 deg F (10 C) increase in the temperature of the reacting materials. Resistance heating -Answer When electric current flows through a conductor, heat is produced. Over current or Overload -Answer