IFSTA Essentials of Fire Fighting 7th Edition
Chapter 4 Study Guide | QUESTIONS & 100%
VERIFIED ANSWERS| GRADED A+ AND
REVISED|LATEST VERSION AND BRAND NEW
VERSION!!!
Where might firefighters be MOST likely to encounter inoperative
standpipes and sprinkler systems?
Select one:
a. Structures at the wildland/urban interface
b. Open-plan commercial structures
c. Residential structures built prior to 1990
d. Buildings under demolition
ANS: d. Buildings under demolition
What occurs during flashover?
Select one:
a. The volume of burning gases can increase to fill the room's entire
volume and extend out of any openings from the room.
b. The compartment will fill with black smoke and slowly cooling fuel
gases; the compartment will show no visible flames.
c. The heat release rate of the fire will reach its peak.
d. Flames propagate through the hot gas layer or across the ceiling.
ANS: a. The volume of burning gases can increase to fill the room's
entire volume and extend out of any openings from the room.
In a compartment fire, smoke flashover indicators include rapidly
increasing volume, turbulence, optical density, and:
Select one:
,a. thermal properties.
b. ventilation.
c. fuel load.
d. darkening color.
ANS: d. darkening color.
Which type of electrical heating occurs when the current flowing
through a conductor exceeds its design limits?
Select one:
a. Arcing
b. Overcurrent or overload
c. Sparking
d. Friction heating
ANS: b. Overcurrent or overload
How does the self-sustained chemical reaction influence the
oxidation reaction in flaming combustion?
Select one:
a. Decreases the types of products of combustion released
b. Decreases the temperature required for the oxidation reaction
c. Increases the speed of the oxidation reaction
d. Increases the ratio of complete to incomplete combustion of fuel
ANS: c. Increases the speed of the oxidation reaction
By which mechanism of heat transfer does heat travel in a straight
line at the speed of light, allowing heat to travel through vacuums
and air spaces?
Select one:
a. Conduction
b. Convection
c. Reflection
d. Radiation
ANS: d. Radiation
,A fuel's chemical content influences its heat release rate and its:
Select one:
a. organic compounds
b. heat of combustion.
c. convective flow.
d. physical attributes.
ANS: b. heat of combustion.
What occurs when a mixture of fuel and oxygen encounters an
external heat source with sufficient heat or thermal energy to start
the combustion reaction?
Select one:
a. Sustained ignition
b. Piloted ignition
c. Kinetic ignition
d. Autoignition
ANS: b. Piloted ignition
Which heat transfer mechanism is dependent on several factors
including the turbulence and velocity of moving gases?
Select one:
a. Radiation
b. Conduction
c. Convection
d. Reflection
ANS: c. Convection
Which statement describes the factor that MOST influences
compartment fire development?
Select one:
a. Whether the fuel is cellulose-based or petroleum-based
b. Whether the fire is fuel-limited or ventilation-limited
c. Ambient temperature and wind speed outside the compartment
d. Ratio of square footage to ceiling height of the compartment
, ANS: b. Whether the fire is fuel-limited or ventilation-limited
Which product of combustion acts as a chemical asphyxiant by
excluding oxygen from the blood, leading to hypoxia of the brain and
tissues?
Select one:
a. Hydrogen cyanide (HCN)
b. Aerosolized fuel particles
c. Carbon dioxide (CO2)
d. Carbon monoxide (CO)
ANS: d. Carbon monoxide (CO)
Which element of the fire tetrahedron is included to explain flaming
(gas-phase) combustion?
Select one:
a. Fuel
b. Chemical chain reaction
c. Heat
d. Oxygen
ANS: b. Chemical chain reaction
Why must firefighters use tactics that control the oxygen available to
the fire when they advance a hoseline through a door or ventilate
windows?
Select one:
a. To prevent unwanted fire spread
b. To increase the pressure inside the compartment
c. To transition the fire to a ventilation-limited environment
d. To maintain structural integrity
ANS: b. To increase the pressure inside the compartment
What is the likely result if additional air is allowed into an already-
ventilated compartment fire?
Select one:
a. Lower neutral plane
Chapter 4 Study Guide | QUESTIONS & 100%
VERIFIED ANSWERS| GRADED A+ AND
REVISED|LATEST VERSION AND BRAND NEW
VERSION!!!
Where might firefighters be MOST likely to encounter inoperative
standpipes and sprinkler systems?
Select one:
a. Structures at the wildland/urban interface
b. Open-plan commercial structures
c. Residential structures built prior to 1990
d. Buildings under demolition
ANS: d. Buildings under demolition
What occurs during flashover?
Select one:
a. The volume of burning gases can increase to fill the room's entire
volume and extend out of any openings from the room.
b. The compartment will fill with black smoke and slowly cooling fuel
gases; the compartment will show no visible flames.
c. The heat release rate of the fire will reach its peak.
d. Flames propagate through the hot gas layer or across the ceiling.
ANS: a. The volume of burning gases can increase to fill the room's
entire volume and extend out of any openings from the room.
In a compartment fire, smoke flashover indicators include rapidly
increasing volume, turbulence, optical density, and:
Select one:
,a. thermal properties.
b. ventilation.
c. fuel load.
d. darkening color.
ANS: d. darkening color.
Which type of electrical heating occurs when the current flowing
through a conductor exceeds its design limits?
Select one:
a. Arcing
b. Overcurrent or overload
c. Sparking
d. Friction heating
ANS: b. Overcurrent or overload
How does the self-sustained chemical reaction influence the
oxidation reaction in flaming combustion?
Select one:
a. Decreases the types of products of combustion released
b. Decreases the temperature required for the oxidation reaction
c. Increases the speed of the oxidation reaction
d. Increases the ratio of complete to incomplete combustion of fuel
ANS: c. Increases the speed of the oxidation reaction
By which mechanism of heat transfer does heat travel in a straight
line at the speed of light, allowing heat to travel through vacuums
and air spaces?
Select one:
a. Conduction
b. Convection
c. Reflection
d. Radiation
ANS: d. Radiation
,A fuel's chemical content influences its heat release rate and its:
Select one:
a. organic compounds
b. heat of combustion.
c. convective flow.
d. physical attributes.
ANS: b. heat of combustion.
What occurs when a mixture of fuel and oxygen encounters an
external heat source with sufficient heat or thermal energy to start
the combustion reaction?
Select one:
a. Sustained ignition
b. Piloted ignition
c. Kinetic ignition
d. Autoignition
ANS: b. Piloted ignition
Which heat transfer mechanism is dependent on several factors
including the turbulence and velocity of moving gases?
Select one:
a. Radiation
b. Conduction
c. Convection
d. Reflection
ANS: c. Convection
Which statement describes the factor that MOST influences
compartment fire development?
Select one:
a. Whether the fuel is cellulose-based or petroleum-based
b. Whether the fire is fuel-limited or ventilation-limited
c. Ambient temperature and wind speed outside the compartment
d. Ratio of square footage to ceiling height of the compartment
, ANS: b. Whether the fire is fuel-limited or ventilation-limited
Which product of combustion acts as a chemical asphyxiant by
excluding oxygen from the blood, leading to hypoxia of the brain and
tissues?
Select one:
a. Hydrogen cyanide (HCN)
b. Aerosolized fuel particles
c. Carbon dioxide (CO2)
d. Carbon monoxide (CO)
ANS: d. Carbon monoxide (CO)
Which element of the fire tetrahedron is included to explain flaming
(gas-phase) combustion?
Select one:
a. Fuel
b. Chemical chain reaction
c. Heat
d. Oxygen
ANS: b. Chemical chain reaction
Why must firefighters use tactics that control the oxygen available to
the fire when they advance a hoseline through a door or ventilate
windows?
Select one:
a. To prevent unwanted fire spread
b. To increase the pressure inside the compartment
c. To transition the fire to a ventilation-limited environment
d. To maintain structural integrity
ANS: b. To increase the pressure inside the compartment
What is the likely result if additional air is allowed into an already-
ventilated compartment fire?
Select one:
a. Lower neutral plane
