1. What is the fire triangle? The fire triangle consists of three elements
required for combustion: fuel, oxygen, and heat. All three must be present for
fire to occur.
2. What is the fire tetrahedron? The fire tetrahedron adds a fourth element to
the fire triangle: the chemical chain reaction. This represents the self-sustaining
nature of combustion.
3. What are the four classes of fire? Class A involves ordinary combustibles
like wood and paper, Class B involves flammable liquids, Class C involves
electrical equipment, and Class D involves combustible metals.
4. What is flashpoint? Flashpoint is the minimum temperature at which a
liquid gives off sufficient vapor to form an ignitable mixture with air near its
surface.
5. What is autoignition temperature? Autoignition temperature is the
minimum temperature at which a substance will spontaneously ignite without an
external ignition source.
6. What does BTU stand for? BTU stands for British Thermal Unit, a measure
of heat energy required to raise one pound of water by one degree Fahrenheit.
7. What is flame spread rating? Flame spread rating is a numerical
designation indicating the rate at which flame will spread across a material's
surface compared to red oak (100) and cement board (0).
8. What is smoke developed index? Smoke developed index measures the
amount of smoke a material produces when burning, with red oak assigned a
value of 100 as the reference.
9. What is combustion? Combustion is a rapid chemical reaction between a
fuel and oxygen that produces heat and light, typically in the form of flame.
,10. What is pyrolysis? Pyrolysis is the chemical decomposition of organic
materials through heating in the absence of oxygen, producing flammable gases
and leaving carbon residue.
11. What is off-gassing? Off-gassing is the release of volatile organic
compounds or gases from materials, which can be accelerated by heat and
contribute to fire spread.
12. What is thermal runaway? Thermal runaway is a situation where an
increase in temperature changes conditions in a way that causes further
temperature increase, creating a self-reinforcing cycle.
13. What is radiant heat? Radiant heat is thermal energy transferred through
electromagnetic waves without requiring a medium, traveling through air or
vacuum.
14. What is conduction? Conduction is heat transfer through direct contact
between materials, where thermal energy moves from higher to lower
temperature areas.
15. What is convection? Convection is heat transfer through the movement of
heated fluids or gases, where warmer, less dense material rises and cooler
material sinks.
16. What is backdraft? Backdraft is a dangerous explosive event that occurs
when oxygen is suddenly introduced to a superheated, oxygen-depleted fire
environment.
17. What is flashover? Flashover is the near-simultaneous ignition of all
combustible materials in an enclosed area when radiant heat reaches critical
levels.
18. What are fire load calculations? Fire load calculations determine the total
amount of combustible materials in a space, measured in pounds per square foot
or BTUs per square foot.
19. What is ignition temperature? Ignition temperature is the minimum
temperature required to initiate combustion in a material when an ignition
source is present.
20. What is flame retardancy? Flame retardancy is the property of materials
that have been treated or manufactured to resist ignition and slow the spread of
fire.
, 21. What is char formation? Char formation is the creation of a carbonaceous
layer on material surfaces during burning, which can provide insulation and
slow further combustion.
22. What is intumescence? Intumescence is the process where materials swell
and form a protective foam-like char layer when exposed to heat, providing
insulation.
23. What is the difference between flammable and combustible liquids?
Flammable liquids have a flashpoint below 100°F, while combustible liquids
have a flashpoint at or above 100°F but below 200°F.
24. What is upper explosive limit (UEL)? The upper explosive limit is the
highest concentration of a gas or vapor in air that will support combustion;
above this level there is insufficient oxygen.
25. What is lower explosive limit (LEL)? The lower explosive limit is the
minimum concentration of a gas or vapor in air required to support combustion;
below this level the mixture is too lean.
26. What is spontaneous combustion? Spontaneous combustion occurs when
materials self-heat due to chemical or biological processes until they reach
ignition temperature without external heat.
27. What is surface burning? Surface burning is combustion that occurs on the
exterior surface of materials, characterized by flame spread across the material
face.
28. What is deep-seated fire? Deep-seated fire penetrates into the interior of
materials, making it difficult to extinguish and requiring sustained firefighting
efforts.
29. What is thermal decomposition? Thermal decomposition is the breakdown
of chemical compounds into simpler substances when exposed to heat, often
producing flammable gases.
30. What factors affect fire development? Key factors include fuel type and
quantity, oxygen availability, compartment geometry, ventilation, material
properties, and environmental conditions.
Section 2: Flame Retardant Chemistry (Questions 31-60)
31. What are flame retardants? Flame retardants are chemical compounds
added to or applied on materials to prevent or slow the spread of fire by various
mechanisms.
required for combustion: fuel, oxygen, and heat. All three must be present for
fire to occur.
2. What is the fire tetrahedron? The fire tetrahedron adds a fourth element to
the fire triangle: the chemical chain reaction. This represents the self-sustaining
nature of combustion.
3. What are the four classes of fire? Class A involves ordinary combustibles
like wood and paper, Class B involves flammable liquids, Class C involves
electrical equipment, and Class D involves combustible metals.
4. What is flashpoint? Flashpoint is the minimum temperature at which a
liquid gives off sufficient vapor to form an ignitable mixture with air near its
surface.
5. What is autoignition temperature? Autoignition temperature is the
minimum temperature at which a substance will spontaneously ignite without an
external ignition source.
6. What does BTU stand for? BTU stands for British Thermal Unit, a measure
of heat energy required to raise one pound of water by one degree Fahrenheit.
7. What is flame spread rating? Flame spread rating is a numerical
designation indicating the rate at which flame will spread across a material's
surface compared to red oak (100) and cement board (0).
8. What is smoke developed index? Smoke developed index measures the
amount of smoke a material produces when burning, with red oak assigned a
value of 100 as the reference.
9. What is combustion? Combustion is a rapid chemical reaction between a
fuel and oxygen that produces heat and light, typically in the form of flame.
,10. What is pyrolysis? Pyrolysis is the chemical decomposition of organic
materials through heating in the absence of oxygen, producing flammable gases
and leaving carbon residue.
11. What is off-gassing? Off-gassing is the release of volatile organic
compounds or gases from materials, which can be accelerated by heat and
contribute to fire spread.
12. What is thermal runaway? Thermal runaway is a situation where an
increase in temperature changes conditions in a way that causes further
temperature increase, creating a self-reinforcing cycle.
13. What is radiant heat? Radiant heat is thermal energy transferred through
electromagnetic waves without requiring a medium, traveling through air or
vacuum.
14. What is conduction? Conduction is heat transfer through direct contact
between materials, where thermal energy moves from higher to lower
temperature areas.
15. What is convection? Convection is heat transfer through the movement of
heated fluids or gases, where warmer, less dense material rises and cooler
material sinks.
16. What is backdraft? Backdraft is a dangerous explosive event that occurs
when oxygen is suddenly introduced to a superheated, oxygen-depleted fire
environment.
17. What is flashover? Flashover is the near-simultaneous ignition of all
combustible materials in an enclosed area when radiant heat reaches critical
levels.
18. What are fire load calculations? Fire load calculations determine the total
amount of combustible materials in a space, measured in pounds per square foot
or BTUs per square foot.
19. What is ignition temperature? Ignition temperature is the minimum
temperature required to initiate combustion in a material when an ignition
source is present.
20. What is flame retardancy? Flame retardancy is the property of materials
that have been treated or manufactured to resist ignition and slow the spread of
fire.
, 21. What is char formation? Char formation is the creation of a carbonaceous
layer on material surfaces during burning, which can provide insulation and
slow further combustion.
22. What is intumescence? Intumescence is the process where materials swell
and form a protective foam-like char layer when exposed to heat, providing
insulation.
23. What is the difference between flammable and combustible liquids?
Flammable liquids have a flashpoint below 100°F, while combustible liquids
have a flashpoint at or above 100°F but below 200°F.
24. What is upper explosive limit (UEL)? The upper explosive limit is the
highest concentration of a gas or vapor in air that will support combustion;
above this level there is insufficient oxygen.
25. What is lower explosive limit (LEL)? The lower explosive limit is the
minimum concentration of a gas or vapor in air required to support combustion;
below this level the mixture is too lean.
26. What is spontaneous combustion? Spontaneous combustion occurs when
materials self-heat due to chemical or biological processes until they reach
ignition temperature without external heat.
27. What is surface burning? Surface burning is combustion that occurs on the
exterior surface of materials, characterized by flame spread across the material
face.
28. What is deep-seated fire? Deep-seated fire penetrates into the interior of
materials, making it difficult to extinguish and requiring sustained firefighting
efforts.
29. What is thermal decomposition? Thermal decomposition is the breakdown
of chemical compounds into simpler substances when exposed to heat, often
producing flammable gases.
30. What factors affect fire development? Key factors include fuel type and
quantity, oxygen availability, compartment geometry, ventilation, material
properties, and environmental conditions.
Section 2: Flame Retardant Chemistry (Questions 31-60)
31. What are flame retardants? Flame retardants are chemical compounds
added to or applied on materials to prevent or slow the spread of fire by various
mechanisms.
