New PDF release: Arson: The Complete Investigator'S Manual

By Paladin Press

This ebook is much from a "complete" investigators handbook. little or no of the e-book really bargains completely with arson research. i wouldn't suggest wasting precious cash on it as I did. (Published via Paladin press - no longer precisely an arson investigating entity!!!)

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The main problem with cooking equipment is the accumulation of grease in the duct, hood, ami fan housing. If a fire should start in the system, burning grease can reach a temperature of2,000°F (1,093°C). Cooking equipment can include ranges, deep fat fryers, portable ovens, convection ovens, steamers, broilers, warmers, microwave ovens, and tilting skillets. Some of this equipment can produce grease-laden vapors that contribute to the spread of fire; installation of such equipment next to combustible materials also can contribute to fire causes.

The best examples of this type are a grinding wheel or the brakes on a railroad train. The third form is the heat of compression. When a gas is compressed, the molecules are forced closer together and heat is produced. Filling SCBA air tanks is one form of this heat. A diesel engine is dependent on this form of heat to run. The spark plugs are replaced with a very high compression ratio (over 20 to 1). The compression of the air in the cylinders increases its temperature above the ignition point of the diesel fuel.

The following chart, taken from NFPA 921, Guide for Fire and Explosion Investigations, provides the melting temperatures of numerous common materials. 539 327 627 1,455 54 1,773 1,549 294-400 1,682-1,699 960 135-177 1,427 1,516 232 49-75 294-400 375 Another reaction that occurs during a fire is the formation of eutectic alloys. Eutectic is the lowest melting point of an alloy or solution of two or more substances that is obtainable by varying the percentage of the components. This takes place when the melting temperature of one material is reached during the fire, and this melting material comes in contact with another metal.

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