1. What is the fire triangle composed of?
o A) Heat, fuel, and carbon dioxide
o B) Heat, fuel, and oxygen
o C) Oxygen, nitrogen, and fuel
o D) Heat, water, and fuel
o ANSWER : B
2. At what temperature does wood typically ignite?
o A) 200°F (93°C)
o B) 300°F (149°C)
o C) 400-500°F (204-260°C)
o D) 600°F (316°C)
o ANSWER : C
3. What is the primary purpose of flame retardants?
o A) To make materials fireproof
o B) To slow down or prevent the spread of fire
o C) To extinguish fires completely
o D) To increase material strength
o ANSWER : B
4. Which class of fire involves ordinary combustible materials?
o A) Class A
o B) Class B
, o C) Class C
o D) Class D
o ANSWER : A
5. What does the term "flashover" mean in fire science?
o A) A small flame that appears briefly
o B) The simultaneous ignition of all combustible materials in a
space
o C) The extinguishment of a fire
o D) A reflection of light from flames
o ANSWER : B
6. Which element is NOT part of the fire tetrahedron?
o A) Heat
o B) Fuel
o C) Oxygen
o D) Nitrogen
o ANSWER : D
7. What is pyrolysis?
o A) The cooling of materials
o B) The chemical decomposition of materials due to heat
o C) The mixing of chemicals
o D) The solidification of liquids
o ANSWER : B
8. What is the autoignition temperature?
o A) The temperature at which a substance will ignite without an
external flame
o B) The temperature at which water boils
o C) The melting point of a material
o D) The freezing point of chemicals
, o ANSWER : A
9. Which type of flame retardant works by forming a protective char
layer?
o A) Gas phase inhibitors
o B) Intumescent coatings
o C) Halogenated compounds
o D) Water-based retardants
o ANSWER : B
10.What does BTU stand for?
o A) British Thermal Unit
o B) Basic Temperature Unit
o C) Burning Time Unit
o D) British Temperature Uniform
o ANSWER : A
11.What is the most common oxidizer in combustion?
o A) Nitrogen
o B) Carbon dioxide
o C) Oxygen
o D) Hydrogen
o ANSWER : C
12.What percentage of oxygen is typically in air?
o A) 15%
o B) 21%
o C) 30%
o D) 50%
o ANSWER : B
13.What is smoldering combustion?
o A) Combustion with visible flames
, o B) Combustion without visible flames
o C) Rapid combustion
o D) Combustion in water
o ANSWER : B
14.Which gas is primarily produced during incomplete combustion?
o A) Oxygen
o B) Nitrogen
o C) Carbon monoxide
o D) Helium
o ANSWER : C
15.What is the lower explosive limit (LEL)?
o A) The highest concentration at which a gas will burn
o B) The lowest concentration at which a gas will ignite
o C) The temperature of ignition
o D) The pressure needed for combustion
o ANSWER : B
16.What does "flame spread rating" measure?
o A) The speed at which flame travels across a material's surface
o B) The temperature of flames
o C) The color of flames
o D) The height of flames
o ANSWER : A
17.What is thermal inertia?
o A) The resistance of a material to temperature change
o B) The speed of heat transfer
o C) The weight of a material
o D) The color change due to heat
o A) Heat, fuel, and carbon dioxide
o B) Heat, fuel, and oxygen
o C) Oxygen, nitrogen, and fuel
o D) Heat, water, and fuel
o ANSWER : B
2. At what temperature does wood typically ignite?
o A) 200°F (93°C)
o B) 300°F (149°C)
o C) 400-500°F (204-260°C)
o D) 600°F (316°C)
o ANSWER : C
3. What is the primary purpose of flame retardants?
o A) To make materials fireproof
o B) To slow down or prevent the spread of fire
o C) To extinguish fires completely
o D) To increase material strength
o ANSWER : B
4. Which class of fire involves ordinary combustible materials?
o A) Class A
o B) Class B
, o C) Class C
o D) Class D
o ANSWER : A
5. What does the term "flashover" mean in fire science?
o A) A small flame that appears briefly
o B) The simultaneous ignition of all combustible materials in a
space
o C) The extinguishment of a fire
o D) A reflection of light from flames
o ANSWER : B
6. Which element is NOT part of the fire tetrahedron?
o A) Heat
o B) Fuel
o C) Oxygen
o D) Nitrogen
o ANSWER : D
7. What is pyrolysis?
o A) The cooling of materials
o B) The chemical decomposition of materials due to heat
o C) The mixing of chemicals
o D) The solidification of liquids
o ANSWER : B
8. What is the autoignition temperature?
o A) The temperature at which a substance will ignite without an
external flame
o B) The temperature at which water boils
o C) The melting point of a material
o D) The freezing point of chemicals
, o ANSWER : A
9. Which type of flame retardant works by forming a protective char
layer?
o A) Gas phase inhibitors
o B) Intumescent coatings
o C) Halogenated compounds
o D) Water-based retardants
o ANSWER : B
10.What does BTU stand for?
o A) British Thermal Unit
o B) Basic Temperature Unit
o C) Burning Time Unit
o D) British Temperature Uniform
o ANSWER : A
11.What is the most common oxidizer in combustion?
o A) Nitrogen
o B) Carbon dioxide
o C) Oxygen
o D) Hydrogen
o ANSWER : C
12.What percentage of oxygen is typically in air?
o A) 15%
o B) 21%
o C) 30%
o D) 50%
o ANSWER : B
13.What is smoldering combustion?
o A) Combustion with visible flames
, o B) Combustion without visible flames
o C) Rapid combustion
o D) Combustion in water
o ANSWER : B
14.Which gas is primarily produced during incomplete combustion?
o A) Oxygen
o B) Nitrogen
o C) Carbon monoxide
o D) Helium
o ANSWER : C
15.What is the lower explosive limit (LEL)?
o A) The highest concentration at which a gas will burn
o B) The lowest concentration at which a gas will ignite
o C) The temperature of ignition
o D) The pressure needed for combustion
o ANSWER : B
16.What does "flame spread rating" measure?
o A) The speed at which flame travels across a material's surface
o B) The temperature of flames
o C) The color of flames
o D) The height of flames
o ANSWER : A
17.What is thermal inertia?
o A) The resistance of a material to temperature change
o B) The speed of heat transfer
o C) The weight of a material
o D) The color change due to heat
