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1. ___________ is the leading cause of arson.: vandalism
2. ________ reactions are those in which heat is produced.: exothermic
3. _________ liquids, such as kerosene and fuel oil, are those with flash points of
100oF or higher.: combustible
4. The ________ stage is the growth phase of a fire, which begins at ignition.: in-
cipient
5. ________ is the process of breaking down solids by heat.: pyrolysis
6. A(n) _________ is a material that is used to start or sustain a fire.: accelerant
7. A(n) ______ will produce a flame only when a sufficient number of fuel mole-
cules exist in the gaseous state.: fuel
8. _________ occurs at a temperature of approximately 1,100oF, causing all fuels
within an area to simultaneously ignite.: flashover
9. The pressures generated by _________ can cause significant structural damage
and endanger the lives of firefighters.: a backdraft
10. Crude petroleum is sent to a refinery and separated by ______________, a
process that separates the hydrocarbons according to their boiling points.: -
fractional distillation
11. In a fire investigation, the place where a fire starts is referred to as the:: point
of origin
12. As a general rule, the ______ the angle of the "V" burn pattern, the longer the
material has been burning.: wider
13. What is a listed indicator of arson?: certain charring patterns, odors, certain smoke patterns
14. ____________ are the most common accelerants and include many petrole-
um-derived liquids as well as alcohols.: hydrocarbons
15. The minimum temperature at which a liquid fuel will produce enough vapor
to burn is known as the:: flash point
16. True or False: A line of demarcation between burned and unburned flooring
is a reliable sign of an accidental fire.: true
17. True or False: Charring on the floor under a coffee table is a likely sign of an
intentional fire.: true
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