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What is the transfer of heat energy without an intervening
p. 95
A.) Expulsion
*B.) Radiation
C.) Convection
D.) Conduction
Which stage of the burning process begins with ignition?
p. 114
A.) Decay
B.) Growth
C.) Fully developed
*D.) Incipient
Approximately how much does water expand with it is
converted to steam?
p. 131
A.) 1,900 times
B.) 1,200 times
*C.) 1,700 times
D.) 1,500 times
What sustains the combustion process?
p. 90
A.) Oxygen
B.) Fuel
C.) Chemical chain reaction
*D.) Heat
Which is the transfer of heat through direct contact?
p. 94
A.) Convection
B.) Radiation
C.) Expulsion
*D.) Conduction
During which stage of pyrolysis does free burning exist as
the wood material is converted to flammable gas?
p. 101
*A.) 4
B.) 1
C.) 2
D.) 3
What is the lowest level of oxygen concentration that can
support flaming combustion at normal ambient temperatures?
p. 103
A.) 16%
B.) 20%
*C.) 14%
D.) 18%
How many sides can fires in fuel packages located in the
corner entrain air from?
p. 116
A.) 4
B.) 3
*C.) 2
D.) 5
Through was action does steel transfer heat to other
combustibles and spread the fire to other compartments?
p. 128
A.) Radiation
*B.) Conduction
C.) Convection
D.) Expulsion
What is the cause of most exposure fires?
p. 96
*A.) Radiation
B.) Expulsion
C.) Convection
D.) Conduction
What term is used to describe a fuel that is above the
upper flammable limit?
p. 105
A.) Too thin
B.) Too lean
C.) Too fat
*D.) Too rich
What can mask the extent of fire development by allowing
the top layer of hot gases to become large?
p. 127
*A.) High ceiling
B.) Leaking walls
C.) Large floor area
D.) Open window
What is the tendency of gases to form into layers
according to temperature?
p. 117
A.) Plume layering
*B.) Thermal layering
C.) Compartment layering
D.) Mushroom layering
Which of the products of combustion have the greatest
impact on firefighters?
p. 107
A.) Light and smoke
B.) Heat and fumes
*C.) Heat and smoke
D.) Light and fumes
What are most common fuels?
p. 96
*A.) Organic
B.) Natural
C.) Unnatural
D.) Inorganic
Which type of energy is produced when fuel burns?
p. 89
A.) Potential
*B.) Kinetic
C.) Chemical
D.) Latent
What is the most fundamental fuel characteristic that
influences fire development in the compartment fire?
p. 125
A.) Mass and amount
*B.) Mass and surface area
C.) Surface area and amount
D.) Surface area and type
When does pyrolysis begin?
p. 100
  *A.) Temperatures below 400 degrees Fahrenheit
B.) Temperatures above 2,000 degrees Fahrenheit
C.) Temperatures below 500 degrees Fahrenheit
D.) Temperatures above 1,000 degrees Fahrenheit
What is the simplest method of fuel removal to extinguish
a fire?
A.) Split the fuel into small groups
B.) Soak it in a chemical agent
*C.) Allow it to burn all of the fuel
D.) Apply the appropriate amount of water
Which type of chemical reaction involves a substance
absorbing energy?
p. 87
A.) Extrathermic
B.) Interthermic
C.) Exothermic
*D.) Endothermic
During what stage of pyrolysis does charring begin?
p. 101
*A.) 2
B.) 1
C.) 3
D.) 4
What is the instantaneous explosion of superheated gases
that occurs when oxygen is introduced into an
oxygen-deficient confined space?
p. 122
A.) Rollover
B.) Flameover
*C.) Backdraft
D.) Flashover
What is one of the most common methods of fire control and
p. 130
A.) Rolling the material over itself
*B.) Cooling the material with water
C.) Smothering the fire with water
D.) Applying a chemical agent
What is the heat release rate (HRR) of a dry Christmas
*A.) 500 to 650 kilowatts
B.) 810 to 970 kilowatts
C.) 140 to 350 kilowatts
D.) 290 to 370 kilowatts
Under backdraft conditions what color does the black smoke
p. 124
A.) Dense brown-green
*B.) Dense gray-yellow
C.) Dense brown-yellow
D.) Dense gray-green
Which of the following materials will conduct heat the
least readily?
p. 94
*A.) Wood
B.) Steel
C.) Concrete
D.) Copper
By what factor is the radiant heat increased when the
temperature is doubled?
p. 96
A.) 8
*B.) 16
C.) 32
D.) 4
. In which direction does a fire tend to extend more rapidly
within the building?
p. 127
A.) Downward
B.) Windward
C.) Leeward
*D.) Upward
What is the agreed upon temperature range that flashover
occurs within?
p. 120
A.) 600 to 1,500 degrees Fahrenheit
B.) 750 to 1,000 degrees Fahrenheit
*C.) 900 to 1,200 degrees Fahrenheit
D.) 800 to 1,300 degrees Fahrenheit
Which type of heat energy is generated by friction or
p. 93
A.) Electrical
B.) Chemical
*C.) Mechanical
D.) Nuclear
Which is considered the most commonly encountered product
of combustion encountered in structural fires?
p. 108
A.) Nitrogen dioxide
B.) Sodium chloride
C.) Sulfur dioxide
*D.) Carbon monoxide
What is the fuel source generally in a Class C fire?
p. 111
*A.) Wiring insulation
B.) Plastics
C.) Metals
D.) Combustible liquids
What phase is the fuel in when flaming combustion occurs?
p. 87
A.) Liquid
*B.) Gas
C.) Solid
D.) Combination
Which of the following has the highest surface-to-mass
p. 102
A.) Log
B.) Sawdust
C.) Boards
*D.) Sanding dust
Which of the following does NOT help to control surface
p. 106-107
A.) Removal of heat
B.) Inhibition of oxygen source
C.) Reduction in fuel source
*D.) Chemical flame inhibition
Which element of combustion has been recently added to
explain combustion via the fire tetrahedron?
p. 87
A.) Oxygen
*B.) Chemical chain reaction
C.) Heat
D.) Fuel
What specific gravity value has water been given?
p. 97
*A.) 1
B.) 4
C.) 3
D.) 2
. When will a liquid have an definite shape?
p. 97
*A.) A flat surface
B.) A round surface
C.) An inverted surface
D.) A curved surface
Which two conditions must be present for flashover to
p. 120-121
A.) Sufficient time and oxygen
B.) Sufficient heat energy and time
C.) Sufficient oxygen and time
*D.) Sufficient heat energy and oxygen
Which of the following indicators of flashover is often a
late sign?
p. 119
A.) Bidirectional air flow
B.) Lowering of the hot gas layer
C.) Hot gases overhead
*D.) Rapidly increasing temperature
Which of the following classes of fire involve energized
electrical equipment?
p. 110
A.) Class A
B.) Class B
C.) Class D
*D.) Class C
Which of the following is NOT generally used for
extinguishment in structure fires?
p. 132
A.) Fuel removal
B.) Temperature reduction
*C.) Oxygen exclusion
D.) Chemical flame inhibition
What is the rapid transition between the growth and fully
developed fire stages?
p. 118
A.) Rollover
B.) Ghosting
*C.) Flashover
D.) Flameover
What temperature change causes the rate at which most
chemical reactions occur to double?
p. 92
A.) 10 degrees Fahrenheit
B.) 16 degrees Fahrenheit
*C.) 18 degrees Fahrenheit
D.) 12 degrees Fahrenheit
Which of the following materials is water soluble and has
a specific gravity of 0.78?
p. 99
A.) Diesel
*B.) Ethanol
C.) Gasoline
D.) Methane
Which of the following is NOT a prebackdraft condition?
p. 123
A.) High heat
B.) Smoldering fire
C.) High fuel vapor concentrations
*D.) High oxygen
What is most often the most readily available source of
fuel in a compartment fire?
p. 126
A.) Building components of the structure
*B.) Contents of the structure
C.) Compartment walls and partitions
D.) Exposures near the structure
Which of the following is the energy component of the fire
p. 90
*A.) Heat
B.) Oxygen
C.) Fuel
D.) Chemical chain reaction
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