Ch 4 IFSTA Exam Questions With Verified Solution 2024/2025
Which type of electrical heating occurs when the current flowing through a conductor exceeds its design limits?
Select one:
a. Friction heating
b. Arcing
c. Overcurrent or overload
d. Sparking - CORRECT ANSWER-Overcurrent or overload
What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with large fuel loads?
Select one:
a. Accessing code enforcement databases
b. Studying plat maps and building plans
c. Performing and updating preincident surveys
d. Contacting the facilities manager during the incident - CORRECT ANSWER-
Performing and updating preincident surveys
Which statement about the dangers of products of combustion is accurate?
Select one:
a. Toxic products of combustion are released only during the combustion reaction.
b. The toxic effects of smoke inhalation are the result of the interaction between carbon monoxide and heat.
c. Low oxygen concentrations alone can result in hypoxia or death.
d. Visible smoke presents the greatest inhalation danger. - CORRECT ANSWER-Low oxygen concentrations alone can result in hypoxia or death. In a ventilation-limited compartment fire that has a large volume of flammable gases, opening a door or window could result in:
Select one:
a. piloted ignition.
b. backdraft.
c. flashover.
d. spontaneous ignition. - CORRECT ANSWER-backdraft.
In a compartment fire, smoke flashover indicators include rapidly increasing volume, turbulence, optical density, and:
Select one:
a. thermal properties.
b. ventilation.
c. darkening color.
d. fuel load. - CORRECT ANSWER-darkening color.
What causes flaming combustion to occur?
Select one:
a. A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
b. A solid fuel mixes with an adequate amount of liquid fuel to be able to sustain an open burning flame.
c. A solid fuel encounters an open flame and entrains enough air to ignite.
d. A gaseous fuel encounters an external heat source and experiences piloted ignition. -
CORRECT ANSWER-A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
Which type of phenomenon occurs when the fire rapidly transitions from the growth stage to the fully developed stage?
Select one:
a. Flame propagation b. Flashover
c. Spontaneous ignition
d. Entrainment - CORRECT ANSWER-Flashover
A fire is said to be in the _____ stage when it runs out of either available fuel or available oxygen.
Select one:
a. fully-developed
b. decay
c. incipient
d. growth - CORRECT ANSWER-decay
The transfer of heat through and between solids is known as:
Select one:
a. self-heating.
b. convection.
c. conduction.
d. radiation. - CORRECT ANSWER-conduction.
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. Aerosolized fuel particles
b. Carbon dioxide (CO2)
c. Hydrogen cyanide (HCN)
d. Carbon monoxide (CO) - CORRECT ANSWER-Carbon monoxide (CO)
What is often the most readily available fuel source and significantly influences fire development in a compartment fire?
Select one:
Which type of electrical heating occurs when the current flowing through a conductor exceeds its design limits?
Select one:
a. Friction heating
b. Arcing
c. Overcurrent or overload
d. Sparking - CORRECT ANSWER-Overcurrent or overload
What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with large fuel loads?
Select one:
a. Accessing code enforcement databases
b. Studying plat maps and building plans
c. Performing and updating preincident surveys
d. Contacting the facilities manager during the incident - CORRECT ANSWER-
Performing and updating preincident surveys
Which statement about the dangers of products of combustion is accurate?
Select one:
a. Toxic products of combustion are released only during the combustion reaction.
b. The toxic effects of smoke inhalation are the result of the interaction between carbon monoxide and heat.
c. Low oxygen concentrations alone can result in hypoxia or death.
d. Visible smoke presents the greatest inhalation danger. - CORRECT ANSWER-Low oxygen concentrations alone can result in hypoxia or death. In a ventilation-limited compartment fire that has a large volume of flammable gases, opening a door or window could result in:
Select one:
a. piloted ignition.
b. backdraft.
c. flashover.
d. spontaneous ignition. - CORRECT ANSWER-backdraft.
In a compartment fire, smoke flashover indicators include rapidly increasing volume, turbulence, optical density, and:
Select one:
a. thermal properties.
b. ventilation.
c. darkening color.
d. fuel load. - CORRECT ANSWER-darkening color.
What causes flaming combustion to occur?
Select one:
a. A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
b. A solid fuel mixes with an adequate amount of liquid fuel to be able to sustain an open burning flame.
c. A solid fuel encounters an open flame and entrains enough air to ignite.
d. A gaseous fuel encounters an external heat source and experiences piloted ignition. -
CORRECT ANSWER-A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
Which type of phenomenon occurs when the fire rapidly transitions from the growth stage to the fully developed stage?
Select one:
a. Flame propagation b. Flashover
c. Spontaneous ignition
d. Entrainment - CORRECT ANSWER-Flashover
A fire is said to be in the _____ stage when it runs out of either available fuel or available oxygen.
Select one:
a. fully-developed
b. decay
c. incipient
d. growth - CORRECT ANSWER-decay
The transfer of heat through and between solids is known as:
Select one:
a. self-heating.
b. convection.
c. conduction.
d. radiation. - CORRECT ANSWER-conduction.
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. Aerosolized fuel particles
b. Carbon dioxide (CO2)
c. Hydrogen cyanide (HCN)
d. Carbon monoxide (CO) - CORRECT ANSWER-Carbon monoxide (CO)
What is often the most readily available fuel source and significantly influences fire development in a compartment fire?
Select one:
