Page 1 of 103
IAAI CFI Exam Bank | Certified Fire
Investigator Exam Prep | Practice
Questions & Answers | Latest Update
2026 | Comprehensive Study Guide
EXAM COVERAGE SUMMARY
This comprehensive examination covers all domains of fire investigation as outlined in NFPA
921 and NFPA 1033, including fire behavior and combustion, fire scene methodology, evidence
collection and documentation, fire patterns and analysis, building construction and systems,
electricity and electrical fires, motor vehicle fires, marine fire investigations, wildland fire
investigations, explosions and blast dynamics, legal aspects of fire investigation, health and
safety protocols, and investigative reporting. The exam emphasizes practical application of
scientific methodology, critical thinking, and scenario-based problem solving essential for the
Certified Fire Investigator credential.
1. A fire investigator arrives at a structural fire scene where the fire has been extinguished but
overhaul operations have not yet begun. What is the investigator's FIRST priority upon arrival?
A) Begin interviewing witnesses immediately
B) Conduct a thorough exterior survey of the structure
, Page 2 of 103
C) Secure the scene and establish a perimeter
D) Request utility company records for the property
✓ C) Secure the scene and establish a perimeter
Securing the scene ensures preservation of physical evidence, establishes control over access,
and prevents contamination or alteration of fire patterns before the investigation proceeds.
2. During a fire scene examination, you observe a V-shaped pattern on a wall with the apex near
the floor. What does this pattern most likely indicate?
A) The fire originated at the ceiling and spread downward
B) The fire originated near the apex and burned upward
C) A liquid accelerant was poured at the base of the wall
D) The fire was extinguished before reaching full development
✓ B) The fire originated near the apex and burned upward
V-patterns with the apex at the lowest point typically indicate the point of origin, as flames travel
upward from the ignition source creating a classic inverted V configuration.
3. The NFPA standard that establishes professional qualifications for fire investigators is:
A) NFPA 921
B) NFPA 1033
C) NFPA 704
D) NFPA 54
✓ B) NFPA 1033
, Page 3 of 103
NFPA 1033, first published in 1987, establishes the job performance requirements for fire
investigators, detailing the knowledge, skills, and abilities needed to conduct competent fire
investigations.
4. Which type of sprinkler head bulb color indicates the lowest activation temperature?
A) Red
B) Orange
C) Black
D) Green
✓ B) Orange
Color-coded sprinkler bulbs range from orange (lowest temperature rating) to black (highest),
with each color corresponding to a specific activation temperature threshold.
5. An electrical circuit has a resistance of 15 ohms and a voltage of 120 volts. According to
Ohm's Law, what is the current flowing through the circuit?
A) 2 amps
B) 8 amps
C) 15 amps
D) 120 amps
✓ B) 8 amps
Ohm's Law states that current equals voltage divided by resistance (I=V/R), so 120 volts divided
by 15 ohms equals 8 amps flowing through the circuit.
, Page 4 of 103
6. What is the minimum temperature typically associated with the onset of flashover in a
compartment fire?
A) 750°F
B) 900°F
C) 1100°F
D) 1300°F
✓ C) 1100°F
Flashover typically occurs when the compartment reaches approximately 1100°F, causing
simultaneous ignition of all exposed combustible surfaces due to radiant heat feedback.
7. A vehicle fire investigator examines a burned vehicle and finds the engine compartment fire
penetrated the interior compartment. Where is this penetration MOST likely to occur?
A) Through the dashboard directly above the steering column
B) Through the firewall at the center console area
C) At the bottom passenger side of the windshield
D) Through the floorboards beneath the driver's seat
✓ C) At the bottom passenger side of the windshield
Engine compartment fires commonly penetrate the interior at the lower passenger side
windshield area, where the firewall often has openings for heating and air conditioning ducts.
8. When investigating a boat fire, what unique identifier should the investigator look for?
A) VIN number
B) HIN number
IAAI CFI Exam Bank | Certified Fire
Investigator Exam Prep | Practice
Questions & Answers | Latest Update
2026 | Comprehensive Study Guide
EXAM COVERAGE SUMMARY
This comprehensive examination covers all domains of fire investigation as outlined in NFPA
921 and NFPA 1033, including fire behavior and combustion, fire scene methodology, evidence
collection and documentation, fire patterns and analysis, building construction and systems,
electricity and electrical fires, motor vehicle fires, marine fire investigations, wildland fire
investigations, explosions and blast dynamics, legal aspects of fire investigation, health and
safety protocols, and investigative reporting. The exam emphasizes practical application of
scientific methodology, critical thinking, and scenario-based problem solving essential for the
Certified Fire Investigator credential.
1. A fire investigator arrives at a structural fire scene where the fire has been extinguished but
overhaul operations have not yet begun. What is the investigator's FIRST priority upon arrival?
A) Begin interviewing witnesses immediately
B) Conduct a thorough exterior survey of the structure
, Page 2 of 103
C) Secure the scene and establish a perimeter
D) Request utility company records for the property
✓ C) Secure the scene and establish a perimeter
Securing the scene ensures preservation of physical evidence, establishes control over access,
and prevents contamination or alteration of fire patterns before the investigation proceeds.
2. During a fire scene examination, you observe a V-shaped pattern on a wall with the apex near
the floor. What does this pattern most likely indicate?
A) The fire originated at the ceiling and spread downward
B) The fire originated near the apex and burned upward
C) A liquid accelerant was poured at the base of the wall
D) The fire was extinguished before reaching full development
✓ B) The fire originated near the apex and burned upward
V-patterns with the apex at the lowest point typically indicate the point of origin, as flames travel
upward from the ignition source creating a classic inverted V configuration.
3. The NFPA standard that establishes professional qualifications for fire investigators is:
A) NFPA 921
B) NFPA 1033
C) NFPA 704
D) NFPA 54
✓ B) NFPA 1033
, Page 3 of 103
NFPA 1033, first published in 1987, establishes the job performance requirements for fire
investigators, detailing the knowledge, skills, and abilities needed to conduct competent fire
investigations.
4. Which type of sprinkler head bulb color indicates the lowest activation temperature?
A) Red
B) Orange
C) Black
D) Green
✓ B) Orange
Color-coded sprinkler bulbs range from orange (lowest temperature rating) to black (highest),
with each color corresponding to a specific activation temperature threshold.
5. An electrical circuit has a resistance of 15 ohms and a voltage of 120 volts. According to
Ohm's Law, what is the current flowing through the circuit?
A) 2 amps
B) 8 amps
C) 15 amps
D) 120 amps
✓ B) 8 amps
Ohm's Law states that current equals voltage divided by resistance (I=V/R), so 120 volts divided
by 15 ohms equals 8 amps flowing through the circuit.
, Page 4 of 103
6. What is the minimum temperature typically associated with the onset of flashover in a
compartment fire?
A) 750°F
B) 900°F
C) 1100°F
D) 1300°F
✓ C) 1100°F
Flashover typically occurs when the compartment reaches approximately 1100°F, causing
simultaneous ignition of all exposed combustible surfaces due to radiant heat feedback.
7. A vehicle fire investigator examines a burned vehicle and finds the engine compartment fire
penetrated the interior compartment. Where is this penetration MOST likely to occur?
A) Through the dashboard directly above the steering column
B) Through the firewall at the center console area
C) At the bottom passenger side of the windshield
D) Through the floorboards beneath the driver's seat
✓ C) At the bottom passenger side of the windshield
Engine compartment fires commonly penetrate the interior at the lower passenger side
windshield area, where the firewall often has openings for heating and air conditioning ducts.
8. When investigating a boat fire, what unique identifier should the investigator look for?
A) VIN number
B) HIN number
