NAFI CFEI Exam Sample Questions with 100%
Approved Answers| Already Passed A+ Grade | Latest
2025/2026.
The decision on what physical evidence to collect at the incident scene rests with the:
A. Fire Chief
B. Incident commander
C. The prosecutor
D. Fire Investigator - ✓✓Correct - D. Fire Investigator
What are the four components of the fire tetrahedron?
A. Oxygen, wood, gas & fire
B. Heat, oxygen, fuel & an uninhibited chemical chain reaction
C. Matches, lighters, candles & inhibited heat transfer
D. Heat, fire, CO2 & gunpowder - ✓✓Correct - B. Heat, oxygen, fuel & an uninhibited chemical chain reaction
The detailed study of how chemistry, fire science, and the engineering disciplines of fl heat transfer interact to
influence fire behavior is known as:
A. Arson
B. Fire protocol
C. Fire chemistry
D. Fire dynamics - ✓✓Correct - D. Fire dynamics
1|Page
, For the accurate investigation of fires, one must focus on the:
A. Cause
B. Extent of damage
C. Injuries resulting from the fire
D. Material involved - ✓✓Correct - A. Cause
A(n) ___________ is a substance that cannot be decomposed into simpler substances by chemical or physical
treatment.
A. Atom
B. Proton
C. Element
D. Molecule - ✓✓Correct - C. Element
All matter is composed of elements or combinations of elements called
A. Atoms
B. Protons
C. Neutrons
D. Compounds - ✓✓Correct - D. Compounds
_________ are compounds composed solely of carbon and hydrogen
A. Hydrocarbons
B. Tetracarbons
C. Chlorocarbons
D. Carbohydrates - ✓✓Correct - A. Hydrocarbons
2|Page
Approved Answers| Already Passed A+ Grade | Latest
2025/2026.
The decision on what physical evidence to collect at the incident scene rests with the:
A. Fire Chief
B. Incident commander
C. The prosecutor
D. Fire Investigator - ✓✓Correct - D. Fire Investigator
What are the four components of the fire tetrahedron?
A. Oxygen, wood, gas & fire
B. Heat, oxygen, fuel & an uninhibited chemical chain reaction
C. Matches, lighters, candles & inhibited heat transfer
D. Heat, fire, CO2 & gunpowder - ✓✓Correct - B. Heat, oxygen, fuel & an uninhibited chemical chain reaction
The detailed study of how chemistry, fire science, and the engineering disciplines of fl heat transfer interact to
influence fire behavior is known as:
A. Arson
B. Fire protocol
C. Fire chemistry
D. Fire dynamics - ✓✓Correct - D. Fire dynamics
1|Page
, For the accurate investigation of fires, one must focus on the:
A. Cause
B. Extent of damage
C. Injuries resulting from the fire
D. Material involved - ✓✓Correct - A. Cause
A(n) ___________ is a substance that cannot be decomposed into simpler substances by chemical or physical
treatment.
A. Atom
B. Proton
C. Element
D. Molecule - ✓✓Correct - C. Element
All matter is composed of elements or combinations of elements called
A. Atoms
B. Protons
C. Neutrons
D. Compounds - ✓✓Correct - D. Compounds
_________ are compounds composed solely of carbon and hydrogen
A. Hydrocarbons
B. Tetracarbons
C. Chlorocarbons
D. Carbohydrates - ✓✓Correct - A. Hydrocarbons
2|Page
