Page 1 of 127
IAAI Fire Investigation Technician (FIT) Practice EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
IAAI Fire Investigation Technician (FIT) Practice Exam
PRACTICE QUESTIONS
DOMAIN 1: THE SCIENTIFIC METHOD & NFPA 921
QUESTION 1
Which document serves as the primary methodology guide for fire and explosion investigations,
as applied by an IAAI-FIT candidate?
A) NFPA 1 Fire Code
B) NFPA 921 Guide for Fire and Explosion Investigations
C) NFPA 1033 Standard for Professional Qualifications for Fire Investigator
D) OSHA 29 CFR 1910 Subpart Z
Correct Answer: B
Rationale: NFPA 921 is the consensus guide that codifies the scientific method for fire and
explosion investigations and is the document referenced throughout the IAAI-FIT and IAAI-CFI
, Page 2 of 127
exams. NFPA 1033 specifies the professional qualifications, but the methodology a FIT applies in
the field is from NFPA 921 .
QUESTION 2
According to NFPA 921, the scientific method applied to fire investigation involves which
sequence of steps?
A) Forming a hypothesis before data collection
B) Collecting data, analyzing, developing a hypothesis, and testing it
C) Relying only on witness statements
D) Using only experimental reconstruction
Correct Answer: B
Rationale: The scientific method includes systematic data collection, analysis, hypothesis
development, and testing. The NFPA 921 scientific method starts with recognizing the need (a
fire occurred) and defining the problem. Data collection, hypothesis formation, hypothesis
testing, and final hypothesis selection follow .
QUESTION 3
Which standard establishes the professional qualifications and job performance requirements
(JPRs) for a fire investigator?
A) NFPA 921
B) NFPA 1033
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C) NFPA 472
D) NFPA 1500
Correct Answer: B
Rationale: NFPA 1033 Standard for Professional Qualifications for Fire Investigator (2022 ed.)
defines the JPRs and the 16 knowledge areas the investigator must remain current on. NFPA 921
is the methodology guide; the two are intentionally paired .
QUESTION 4
The "scientific method" requires that a hypothesis be:
A) Based solely on circumstantial evidence
B) Capable of being tested and potentially disproven
C) Accepted without testing
D) Based only on witness statements
Correct Answer: B
Rationale: A valid hypothesis must be testable and falsifiable; investigators must seek
disconfirming evidence. This is a core principle of the scientific method as applied to fire
investigation .
DOMAIN 2: FIRE DYNAMICS & THE FIRE TETRAHEDRON
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QUESTION 5
Which of the following best describes the components of the fire tetrahedron?
A) Heat, fuel, oxidizer, and an uninhibited chemical chain reaction
B) Heat, smoke, fuel, and water
C) Oxygen, gasoline, ignition, and ventilation
D) Combustion, conduction, convection, and radiation
Correct Answer: A
Rationale: The fire tetrahedron consists of heat (energy), fuel, an oxidizing agent, and an
uninhibited self-sustaining chemical chain reaction. Removing any leg extinguishes the fire —
the basis for most extinguishing techniques .
QUESTION 6
What is the term for the thermal decomposition of a solid material, producing flammable
vapors?
A) Vaporization
B) Sublimation
C) Pyrolysis
D) Oxidation
Correct Answer: C
Rationale: Pyrolysis is the thermal decomposition of a solid material (often organic) into smaller
IAAI Fire Investigation Technician (FIT) Practice EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
IAAI Fire Investigation Technician (FIT) Practice Exam
PRACTICE QUESTIONS
DOMAIN 1: THE SCIENTIFIC METHOD & NFPA 921
QUESTION 1
Which document serves as the primary methodology guide for fire and explosion investigations,
as applied by an IAAI-FIT candidate?
A) NFPA 1 Fire Code
B) NFPA 921 Guide for Fire and Explosion Investigations
C) NFPA 1033 Standard for Professional Qualifications for Fire Investigator
D) OSHA 29 CFR 1910 Subpart Z
Correct Answer: B
Rationale: NFPA 921 is the consensus guide that codifies the scientific method for fire and
explosion investigations and is the document referenced throughout the IAAI-FIT and IAAI-CFI
, Page 2 of 127
exams. NFPA 1033 specifies the professional qualifications, but the methodology a FIT applies in
the field is from NFPA 921 .
QUESTION 2
According to NFPA 921, the scientific method applied to fire investigation involves which
sequence of steps?
A) Forming a hypothesis before data collection
B) Collecting data, analyzing, developing a hypothesis, and testing it
C) Relying only on witness statements
D) Using only experimental reconstruction
Correct Answer: B
Rationale: The scientific method includes systematic data collection, analysis, hypothesis
development, and testing. The NFPA 921 scientific method starts with recognizing the need (a
fire occurred) and defining the problem. Data collection, hypothesis formation, hypothesis
testing, and final hypothesis selection follow .
QUESTION 3
Which standard establishes the professional qualifications and job performance requirements
(JPRs) for a fire investigator?
A) NFPA 921
B) NFPA 1033
, Page 3 of 127
C) NFPA 472
D) NFPA 1500
Correct Answer: B
Rationale: NFPA 1033 Standard for Professional Qualifications for Fire Investigator (2022 ed.)
defines the JPRs and the 16 knowledge areas the investigator must remain current on. NFPA 921
is the methodology guide; the two are intentionally paired .
QUESTION 4
The "scientific method" requires that a hypothesis be:
A) Based solely on circumstantial evidence
B) Capable of being tested and potentially disproven
C) Accepted without testing
D) Based only on witness statements
Correct Answer: B
Rationale: A valid hypothesis must be testable and falsifiable; investigators must seek
disconfirming evidence. This is a core principle of the scientific method as applied to fire
investigation .
DOMAIN 2: FIRE DYNAMICS & THE FIRE TETRAHEDRON
, Page 4 of 127
QUESTION 5
Which of the following best describes the components of the fire tetrahedron?
A) Heat, fuel, oxidizer, and an uninhibited chemical chain reaction
B) Heat, smoke, fuel, and water
C) Oxygen, gasoline, ignition, and ventilation
D) Combustion, conduction, convection, and radiation
Correct Answer: A
Rationale: The fire tetrahedron consists of heat (energy), fuel, an oxidizing agent, and an
uninhibited self-sustaining chemical chain reaction. Removing any leg extinguishes the fire —
the basis for most extinguishing techniques .
QUESTION 6
What is the term for the thermal decomposition of a solid material, producing flammable
vapors?
A) Vaporization
B) Sublimation
C) Pyrolysis
D) Oxidation
Correct Answer: C
Rationale: Pyrolysis is the thermal decomposition of a solid material (often organic) into smaller
