ASSIGNMENT 12
Textbook Assignment: "Crash Rescue and Fire Fighting," chapter 12, pages 12-1 through 12-21.
12-1.
What is the primary duty of a fire fighter?
1.
To prevent fire from spreading
2.
To save lives
3.
To extinguish fire
4.
To protect Navy equipment
12-2.
There are four elements in the process of fire.
The fourth element is a chemical reaction that
allows the fire to sustain itself and grow. Which
of the following terms describes this process?
1.
Fire triangle
2.
Fire cube
3.
Fire tetrahedron
4.
Fire matrix
12-3.
What is the term used to describe the lowest
temperature at which vapors of a substance can
be ignited and continue to burn?
1.
Fire point
2.
Flash point
3.
Ignition point
4.
Spark point
12-4.
What is the term used to describe the tempera-
ture at which a substance gives off enough
vapors to form an ignitable mixture in the air
near its surface?
1.
Fire point
2.
Flash point
3.
Ignition point
4.
Spark point
12-5.
At what exposed temperatures will a portion of
fuel (or its vapors) spontaneously ignite?
1.
200°F
2.
300°F
3.
400°F
4.
500°F
12-6.
What class of fires occur in combustible mate-
rials, such as bedding, mattresses, books, cloth,
and any matter that produces an ash?
1.
Class A
2.
Class B
3.
Class C
4.
Class D
12-7.
What class of fires occur with flammable liq-
uid substances, such as gasoline, jet fuels,
paints,
grease,
and
any
petroleum-based
products?
1.
Class A
2.
Class B
3.
Class C
4.
Class D
12-8.
What class of fires is associated with electric-
ally energized equipment?
1.
Class A
2.
Class B
3.
Class C
4.
Class D
12-9.
What class of fires is associated with combusti-
ble metals, such as magnesium and titanium?
1.
Class A
2.
Class B
3.
Class C
4.
Class D
12-10. Water is most efficient when it absorbs enough
heat to raise its temperature to a boiling point,
and then changes to steam that carries away the
heat, which cools the surface temperature.
1.
True
2.
False
12-11. When proportioned with water, AFFF provides
which of the following fire-extinguishing
advantages?
1.
An aqueous film is formed on the surface
of the fuel that prevents the escape of the
fuel vapors
2.
The layer effectively excludes oxygen
from the fuel surface
3.
The water content of the foam provides a
cooling effect
4.
Each of the above
12-23
