COMPREHENSIVE TEST BANK WITH DETAILED
SOLUTIONS GRADED A+
◉ What are the components of the fire tetrahedron? Answer: heat, fuel,
oxygen, chain reaction
◉ How do you stop a fire? Answer: Remove any of the components of
the fire tetrahedron (i.e. remove fuel, oxygen, heat, or interrupt the
chemical reaction)
◉ Oxygen Answer: -21% ambient air
-robust flaming combustion down to 15-16%
-surface combustion (smoldering) down to about 11%
-loss of consciousness in atmospheres with 12% or less oxygen
◉ Heat Answer: anything that produces the required temperature for
ignition
-sun
-open flame
-chemical reaction
, -sparks
-friction
◉ Fuel Answer: -only vapors burn
-liquids and solids must first be vaporized
-tendency of a substance to vaporize is an indication of its ability to burn
-liquids vaporize more readily than solids
◉ Chain reaction Answer: -you can have oxygen, heat, and fuel in the
same place and still not have a fire
-fuel and oxygen relationship must be balanced (i.e. in the flammable
range)
-heat must be sufficient to bring fuel to its ignition
◉ What is a flash point (of a liquid)? Answer: -the lower temp that a
liquid can give off sufficient gas to form a flammable gas mixture near
the surface of a liquid
-lowest temp at which we can have fire
-fire flashes across surface given sufficient oxygen and an external
source of ignition
◉ What is a Fire point? Answer: -just above the flash point, liquid gives
off flammable vapors rapidly enough to support continuous combustion