FIRE SCIENCE
What are the four parts to the fire tetrahedron?
a. Heat b. Oxygen c. Fuel d. Chain Reaction
Combustion cannot be supported below what oxygen concentrations?
3%
The tendency of gasses to form layers according to their temperature is known as ____
THERMAL LAYERING
An explosive ignition of gasses that results when air enters a compartment and mixes with hot, unburned gasses is known a
BACKDRAFT
In the North American fire classification system, which type of fire involves ordinary combustible materials, paper, plastic , wood rubber?
Class A (Alpha)
According to the __________, heat tends to flow from a hot substance to a cold substance.
Law of Heat Flow
Temperature at which a material gives off enough vapors to momentarily flash when exposed to an ignition source is called ________
flash point
During what stage of a fire does the amount of heat energy released begin to decline and become fuel controlled?
What signs can you look for to indicate a back draft?
moke stained windows, Smoke exiting under pressure Appearance of door trying to "breathe
In the North American fire classification system, which type of fire involves flammable and combustible liquids and gasses?
CLASS B
The transfer of heat from one body to another body by direct contact is known as
Conduction
The minimum and maximum percentage's of a substance in air that burns once it is ignited is known a
flammable limits/range
Another name for a small fire in the ignition or growth stages is the __________ Phase
Incipient
Rapid oxidation is more commonly known as
COMBUSTION
In the North American fire classification system, which type of fire involves Electricity ?
CLASS C
A hand held a few inches above a flame feels the heat by _________
Convection
Compressible substance with no specific volume that tends to assume the shape of its container is
Gas
The most hazardous part of smoke is what?
Carbon monoxide
What are six common extinguishing agents found aboard a vessel?
A. Water B. Foam, C. Halon D. CO2 E. Dry chemical F. Dry powder
In the North American fire classification system, which type of fire involves Combustible Metals:
CLASS D
Flaming combustion cannot be supported below what oxygen concentrations
15%
In the North American fire classification system, which type of fire involves ordinary combustible materials?
Class A
A condition that occurs when flames move through or across unburned gasses during a fire's progression is known as a
Rollover
One gallon of water expands __________ times into steam
1700
In the North American fire classification system, which type of fire involves Cooking oils or fats in the galley
CLASS K