ESSENTIALS OF FIRE FIGHTING 7TH EDITION -
CHAPTER 4: FIRE DYNAMICS
Which stage of fire development occurs when the fire is small and confined to the fuel
first ignited?
A. Decay
B. Growth
C. Incipient
D. Fully developed - Answers -C. Incipient
Chapter 4 - page 146
The are surrounding a heat source in which there is sufficient air available to feed a fire
is the __________ zone.
A. Fire
B. Burning
C. Combustion
D. Entrainment - Answers -C. Combustion
Chapter 4 - page 149
An example of an inorganic fuel is:
A. Wood
B. Plastics
C. Gasoline
D. Hydrogen - Answers -D. Hydrogen
Chapter 4 - page 135
Two surfaces rubbing together creates friction, which generates:
A. Kinetic energy
B. Chemical energy
C. Electrical energy
D. Mechanical energy - Answers -D. Mechanical energy
Chapter 4 - page 140
In ventilation-limited fires, any kind of ventilation will:
A. Cause the fire to decay
, B. Cause the fire to smoulder
C. Increase the combustion rate
D. Decrease the heat release rate - Answers -C. Increase the combustion rate
Chapter 4 - page 152
When the air supply to a fire is limited, the level of incomplete combustion is higher,
which:
A. Limits smoke density
B. Produces more smoke
C. Improves fire fighting conditions
D. Results in fewer products of combustion - Answers -B . Produces more smoke
Chapter 4 - page 124
The appearance of isolated or intermittent flames moving through the hot gas layer in a
compartment can indicate that:
A. Flashover is about to occur
B. The fire is entering the growth stage
C. The fire is becoming ventilation-limited
D. Addition of oxygen to the compartment will force the fire into decay - Answers -A.
Flashover is about to occur
Chapter 4 - page 150
In order to burn, liquid fuels must:
A. Pyrolyze
B. Vaporize
C. Have a specific gravity less than one
D. Have a specific gravity greater than one - Answers -B. Vaporize
Chapter 4 - page 138
Pyrolysis occurs when a:
A. Fuel in any state reaches its autoignition temperature
B. Miscible material mixes with a polar solvent and ignites
C. Combustible gas is cooled to the point where it cannot ignite
D. Solid fuel is heated sufficiently so that it decomposes and gives off combustible
vapours - Answers -D. Solid fuel is heated sufficiently so that it decomposes and gives
off combustible vapours
Chapter 4 - page 139
CHAPTER 4: FIRE DYNAMICS
Which stage of fire development occurs when the fire is small and confined to the fuel
first ignited?
A. Decay
B. Growth
C. Incipient
D. Fully developed - Answers -C. Incipient
Chapter 4 - page 146
The are surrounding a heat source in which there is sufficient air available to feed a fire
is the __________ zone.
A. Fire
B. Burning
C. Combustion
D. Entrainment - Answers -C. Combustion
Chapter 4 - page 149
An example of an inorganic fuel is:
A. Wood
B. Plastics
C. Gasoline
D. Hydrogen - Answers -D. Hydrogen
Chapter 4 - page 135
Two surfaces rubbing together creates friction, which generates:
A. Kinetic energy
B. Chemical energy
C. Electrical energy
D. Mechanical energy - Answers -D. Mechanical energy
Chapter 4 - page 140
In ventilation-limited fires, any kind of ventilation will:
A. Cause the fire to decay
, B. Cause the fire to smoulder
C. Increase the combustion rate
D. Decrease the heat release rate - Answers -C. Increase the combustion rate
Chapter 4 - page 152
When the air supply to a fire is limited, the level of incomplete combustion is higher,
which:
A. Limits smoke density
B. Produces more smoke
C. Improves fire fighting conditions
D. Results in fewer products of combustion - Answers -B . Produces more smoke
Chapter 4 - page 124
The appearance of isolated or intermittent flames moving through the hot gas layer in a
compartment can indicate that:
A. Flashover is about to occur
B. The fire is entering the growth stage
C. The fire is becoming ventilation-limited
D. Addition of oxygen to the compartment will force the fire into decay - Answers -A.
Flashover is about to occur
Chapter 4 - page 150
In order to burn, liquid fuels must:
A. Pyrolyze
B. Vaporize
C. Have a specific gravity less than one
D. Have a specific gravity greater than one - Answers -B. Vaporize
Chapter 4 - page 138
Pyrolysis occurs when a:
A. Fuel in any state reaches its autoignition temperature
B. Miscible material mixes with a polar solvent and ignites
C. Combustible gas is cooled to the point where it cannot ignite
D. Solid fuel is heated sufficiently so that it decomposes and gives off combustible
vapours - Answers -D. Solid fuel is heated sufficiently so that it decomposes and gives
off combustible vapours
Chapter 4 - page 139
