IAAI CFI EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS LATEST UPDATED
(PASS GUARANTEE)
1. What are the three components of the fire triangle?
• Answer: Fuel, Heat, and Oxygen
2. What are the four components of the fire tetrahedron?
• Answer: Fuel, Heat, Oxygen, and Chemical Chain Reaction
3. What is the definition of pyrolysis?
• Answer: The thermal decomposition of materials at elevated temperatures
in an inert atmosphere, which causes a material to change its chemical
composition, typically producing combustible gases.
4. What is the primary mechanism of heat transfer from a fully developed
compartment fire to adjacent spaces?
• Answer: Radiation
5. Which heat transfer method is responsible for the preheating of fuels
above a fire?
• Answer: Convection
6. What is the difference between smoldering and flaming combustion?
• Answer: Smoldering combustion is a slow, low-temperature, flameless
form of combustion, sustained by the heat evolved when oxygen directly
attacks the surface of a condensed-phase fuel. Flaming combustion
involves the combustion of gases with visible flames.
7. What is backdraft?
, • Answer: A backdraft is the explosive or rapid burning of heated gases
that occurs when oxygen is introduced into an oxygen-depleted confined
space where a fire has been burning.
8. What is flashover?
• Answer: Flashover is the near-simultaneous ignition of most combustible
contents in an enclosed area when certain thermal conditions are reached.
9. What is the primary constituent of smoke?
• Answer: Unburned and partially burned fuel particles suspended in air
along with gases and water vapor
10. What is the ignition temperature of a material? - Answer: The minimum
temperature required to ignite a substance and sustain combustion without an
external ignition source
11. What is the difference between conduction and convection? - Answer:
Conduction is heat transfer through direct contact between objects, while
convection is heat transfer through the movement of fluids (liquids or gases)
12. What is the heat release rate (HRR)? - Answer: The rate at which heat
energy is generated by burning, measured in kilowatts (kW) or megawatts
(MW)
13. What is a fuel load in fire science? - Answer: The total quantity of
combustible contents of a building, space, or fire area, including furnishings,
built-in and removable materials, and building components
14. What is a flame front? - Answer: The visible edge of a flame where
combustion takes place
15. What is thermal inertia? - Answer: A material's resistance to temperature
change, determined by its density, specific heat, and thermal conductivity
16. What is the fire plume? - Answer: The column of hot gases, flame, and
smoke rising above a fire
17. What is a hot gas layer? - Answer: The accumulation of hot fire gases that
collect at the ceiling level of a room during a fire
18. What effect does ventilation have on a developing fire? - Answer:
Ventilation provides oxygen that can increase the fire's intensity and spread
rate; properly controlled ventilation can be used tactically to control a fire
, 19. What is the difference between flammable and combustible liquids? -
Answer: Flammable liquids have a flash point below 100°F (37.8°C), while
combustible liquids have a flash point at or above 100°F (37.8°C)
20. What is the auto-ignition temperature? - Answer: The minimum
temperature at which a substance will spontaneously ignite without an external
ignition source
21. What is the difference between a flash point and a fire point? - Answer:
Flash point is the lowest temperature at which vapors of a volatile material will
ignite with a temporary flame when an ignition source is applied. Fire point is
the temperature at which the vapor continues to burn after being ignited.
22. What causes rollover during a fire? - Answer: Rollover occurs when
unburned fire gases collect at the ceiling and ignite, causing flames to "roll"
across the ceiling
23. Define the term "heat of combustion." - Answer: The amount of heat
energy released when a specific amount of a substance undergoes complete
combustion, typically measured in joules per gram or kilojoules per mole
24. What is stoichiometric combustion? - Answer: Combustion that occurs
with the exact amount of oxygen needed for complete combustion of the fuel,
with no excess oxygen or fuel remaining
25. What is an oxidizing agent? - Answer: A substance that causes oxidation
by accepting electrons from another substance; in fires, oxygen typically acts as
the oxidizing agent
26. What is char depth analysis? - Answer: A method used to estimate fire
duration by measuring the depth to which wood has been converted to char
27. What are the typical burning rates for various fuels such as wood,
plastics, and upholstered furniture? - Answer: Wood typically burns at 0.8-
1.0 mm/min, plastics vary widely (3-5 mm/min for some thermoplastics), and
upholstered furniture can release heat at rates of 1-5 MW depending on
materials
28. What is the neutral plane in a compartment fire? - Answer: The
theoretical level in a room where there is no pressure difference between inside
and outside, with hot gases flowing out above this plane and fresh air flowing in
below it
VERIFIED ANSWERS LATEST UPDATED
(PASS GUARANTEE)
1. What are the three components of the fire triangle?
• Answer: Fuel, Heat, and Oxygen
2. What are the four components of the fire tetrahedron?
• Answer: Fuel, Heat, Oxygen, and Chemical Chain Reaction
3. What is the definition of pyrolysis?
• Answer: The thermal decomposition of materials at elevated temperatures
in an inert atmosphere, which causes a material to change its chemical
composition, typically producing combustible gases.
4. What is the primary mechanism of heat transfer from a fully developed
compartment fire to adjacent spaces?
• Answer: Radiation
5. Which heat transfer method is responsible for the preheating of fuels
above a fire?
• Answer: Convection
6. What is the difference between smoldering and flaming combustion?
• Answer: Smoldering combustion is a slow, low-temperature, flameless
form of combustion, sustained by the heat evolved when oxygen directly
attacks the surface of a condensed-phase fuel. Flaming combustion
involves the combustion of gases with visible flames.
7. What is backdraft?
, • Answer: A backdraft is the explosive or rapid burning of heated gases
that occurs when oxygen is introduced into an oxygen-depleted confined
space where a fire has been burning.
8. What is flashover?
• Answer: Flashover is the near-simultaneous ignition of most combustible
contents in an enclosed area when certain thermal conditions are reached.
9. What is the primary constituent of smoke?
• Answer: Unburned and partially burned fuel particles suspended in air
along with gases and water vapor
10. What is the ignition temperature of a material? - Answer: The minimum
temperature required to ignite a substance and sustain combustion without an
external ignition source
11. What is the difference between conduction and convection? - Answer:
Conduction is heat transfer through direct contact between objects, while
convection is heat transfer through the movement of fluids (liquids or gases)
12. What is the heat release rate (HRR)? - Answer: The rate at which heat
energy is generated by burning, measured in kilowatts (kW) or megawatts
(MW)
13. What is a fuel load in fire science? - Answer: The total quantity of
combustible contents of a building, space, or fire area, including furnishings,
built-in and removable materials, and building components
14. What is a flame front? - Answer: The visible edge of a flame where
combustion takes place
15. What is thermal inertia? - Answer: A material's resistance to temperature
change, determined by its density, specific heat, and thermal conductivity
16. What is the fire plume? - Answer: The column of hot gases, flame, and
smoke rising above a fire
17. What is a hot gas layer? - Answer: The accumulation of hot fire gases that
collect at the ceiling level of a room during a fire
18. What effect does ventilation have on a developing fire? - Answer:
Ventilation provides oxygen that can increase the fire's intensity and spread
rate; properly controlled ventilation can be used tactically to control a fire
, 19. What is the difference between flammable and combustible liquids? -
Answer: Flammable liquids have a flash point below 100°F (37.8°C), while
combustible liquids have a flash point at or above 100°F (37.8°C)
20. What is the auto-ignition temperature? - Answer: The minimum
temperature at which a substance will spontaneously ignite without an external
ignition source
21. What is the difference between a flash point and a fire point? - Answer:
Flash point is the lowest temperature at which vapors of a volatile material will
ignite with a temporary flame when an ignition source is applied. Fire point is
the temperature at which the vapor continues to burn after being ignited.
22. What causes rollover during a fire? - Answer: Rollover occurs when
unburned fire gases collect at the ceiling and ignite, causing flames to "roll"
across the ceiling
23. Define the term "heat of combustion." - Answer: The amount of heat
energy released when a specific amount of a substance undergoes complete
combustion, typically measured in joules per gram or kilojoules per mole
24. What is stoichiometric combustion? - Answer: Combustion that occurs
with the exact amount of oxygen needed for complete combustion of the fuel,
with no excess oxygen or fuel remaining
25. What is an oxidizing agent? - Answer: A substance that causes oxidation
by accepting electrons from another substance; in fires, oxygen typically acts as
the oxidizing agent
26. What is char depth analysis? - Answer: A method used to estimate fire
duration by measuring the depth to which wood has been converted to char
27. What are the typical burning rates for various fuels such as wood,
plastics, and upholstered furniture? - Answer: Wood typically burns at 0.8-
1.0 mm/min, plastics vary widely (3-5 mm/min for some thermoplastics), and
upholstered furniture can release heat at rates of 1-5 MW depending on
materials
28. What is the neutral plane in a compartment fire? - Answer: The
theoretical level in a room where there is no pressure difference between inside
and outside, with hot gases flowing out above this plane and fresh air flowing in
below it
