FIREFIGHTER CANDIDATE WRITTEN
Exam Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
Combustion is best defined as:
A. A chemical reaction that produces light only
B. A rapid oxidation process that produces heat and light
C. A physical change in matter
D. A cooling process
Correct Answer: B
Rationale:
Combustion is a chemical reaction involving oxygen that produces heat, light, and
fire.
Question 2
The four elements of the fire tetrahedron are heat, fuel, oxygen, and:
A. Smoke
B. Chain reaction
C. Water
D. Carbon dioxide
Correct Answer: B
Rationale:
The chain reaction sustains combustion along with heat, fuel, and oxygen.
,Question 3
The lowest temperature at which a substance produces vapors that ignite is
called:
A. Boiling point
B. Flash point
C. Melting point
D. Fire point
Correct Answer: B
Rationale:
Flash point is the temperature at which vapors ignite temporarily.
Question 4
The fire point is:
A. Lower than flash point
B. The temperature where sustained burning occurs
C. The freezing point of fuel
D. The point where oxygen is removed
Correct Answer: B
Rationale:
Fire point is when fuel continues to burn after ignition.
Question 5
Oxygen concentration in normal air is approximately:
A. 10%
B. 15%
C. 21%
D. 30%
,Correct Answer: C
Rationale:
Atmospheric oxygen is about 21%.
Question 6
Heat transfer by direct contact is called:
A. Radiation
B. Conduction
C. Convection
D. Expansion
Correct Answer: B
Rationale:
Conduction transfers heat through physical contact.
Question 7
Heat transfer through fluid movement is:
A. Conduction
B. Radiation
C. Convection
D. Absorption
Correct Answer: C
Rationale:
Convection involves heat movement through gases or liquids.
Question 8
Heat transfer through electromagnetic waves is:
, A. Conduction
B. Convection
C. Radiation
D. Compression
Correct Answer: C
Rationale:
Radiation transfers heat without direct contact.
Question 9
Class A fires involve:
A. Metals
B. Ordinary combustible materials
C. Electrical equipment
D. Cooking oils
Correct Answer: B
Rationale:
Class A fires involve wood, paper, and cloth.
Question 10
Class B fires involve:
A. Ordinary combustibles
B. Flammable liquids
C. Metals
D. Electrical wires only
Correct Answer: B
Rationale:
Class B fires involve gasoline, oil, and solvents.
Exam Questions and Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
Combustion is best defined as:
A. A chemical reaction that produces light only
B. A rapid oxidation process that produces heat and light
C. A physical change in matter
D. A cooling process
Correct Answer: B
Rationale:
Combustion is a chemical reaction involving oxygen that produces heat, light, and
fire.
Question 2
The four elements of the fire tetrahedron are heat, fuel, oxygen, and:
A. Smoke
B. Chain reaction
C. Water
D. Carbon dioxide
Correct Answer: B
Rationale:
The chain reaction sustains combustion along with heat, fuel, and oxygen.
,Question 3
The lowest temperature at which a substance produces vapors that ignite is
called:
A. Boiling point
B. Flash point
C. Melting point
D. Fire point
Correct Answer: B
Rationale:
Flash point is the temperature at which vapors ignite temporarily.
Question 4
The fire point is:
A. Lower than flash point
B. The temperature where sustained burning occurs
C. The freezing point of fuel
D. The point where oxygen is removed
Correct Answer: B
Rationale:
Fire point is when fuel continues to burn after ignition.
Question 5
Oxygen concentration in normal air is approximately:
A. 10%
B. 15%
C. 21%
D. 30%
,Correct Answer: C
Rationale:
Atmospheric oxygen is about 21%.
Question 6
Heat transfer by direct contact is called:
A. Radiation
B. Conduction
C. Convection
D. Expansion
Correct Answer: B
Rationale:
Conduction transfers heat through physical contact.
Question 7
Heat transfer through fluid movement is:
A. Conduction
B. Radiation
C. Convection
D. Absorption
Correct Answer: C
Rationale:
Convection involves heat movement through gases or liquids.
Question 8
Heat transfer through electromagnetic waves is:
, A. Conduction
B. Convection
C. Radiation
D. Compression
Correct Answer: C
Rationale:
Radiation transfers heat without direct contact.
Question 9
Class A fires involve:
A. Metals
B. Ordinary combustible materials
C. Electrical equipment
D. Cooking oils
Correct Answer: B
Rationale:
Class A fires involve wood, paper, and cloth.
Question 10
Class B fires involve:
A. Ordinary combustibles
B. Flammable liquids
C. Metals
D. Electrical wires only
Correct Answer: B
Rationale:
Class B fires involve gasoline, oil, and solvents.
