NAFI CFEI Test QUESTIONS & ANSWERS
2026 | A+ GRADED 100% VERIFIED –
Updated
• Fire tetrahedron component . Answer: Not including Light.
• Backdraft . Answer: Occurs when oxygen is introduced into an
oxygen-depleted environment.
• Bias in fire investigation . Answer: Must be avoided by a fire
investigator.
• First step in the scientific method . Answer: Form a hypothesis.
• Tool for evaluating circuit integrity . Answer: Multimeter.
• High-order explosions . Answer: Result in large craters and extensive
fragmentation.
• V-patterns . Answer: Always point to the point of origin.
• Chain of custody . Answer: Essential for evidence integrity.
• Recommended method for fire investigation according to NFPA 921 .
Answer: Scientific method.
• Opinions in court . Answer: A fire investigator cannot offer opinions
outside their area of expertise.
, • Factors affecting fire pattern appearance . Answer: Ventilation,
Material type, Suppression efforts, All of the above.
• NFPA 921 requirement . Answer: Requires fire investigators to be
licensed engineers.
• Digital photographs . Answer: Can be altered and are not admissible in
court.
• Cause of an explosion . Answer: Not typically a cause.
• Mechanical failure . Answer: A failure in machinery that can lead to
accidents or incidents.
• Dust accumulation . Answer: The buildup of dust that can contribute to
fire hazards.
• Electrical short . Answer: A fault in an electrical circuit that causes a
current to flow along an unintended path.
• Radiation leakage . Answer: The unintended release of radiation from a
source.
• Multimeter . Answer: A tool typically used to evaluate circuit integrity.
• Bias . Answer: A tendency to favor one perspective over others, which
a fire investigator must avoid.
• Ventilation . Answer: The process that can affect fire pattern
appearance.
2026 | A+ GRADED 100% VERIFIED –
Updated
• Fire tetrahedron component . Answer: Not including Light.
• Backdraft . Answer: Occurs when oxygen is introduced into an
oxygen-depleted environment.
• Bias in fire investigation . Answer: Must be avoided by a fire
investigator.
• First step in the scientific method . Answer: Form a hypothesis.
• Tool for evaluating circuit integrity . Answer: Multimeter.
• High-order explosions . Answer: Result in large craters and extensive
fragmentation.
• V-patterns . Answer: Always point to the point of origin.
• Chain of custody . Answer: Essential for evidence integrity.
• Recommended method for fire investigation according to NFPA 921 .
Answer: Scientific method.
• Opinions in court . Answer: A fire investigator cannot offer opinions
outside their area of expertise.
, • Factors affecting fire pattern appearance . Answer: Ventilation,
Material type, Suppression efforts, All of the above.
• NFPA 921 requirement . Answer: Requires fire investigators to be
licensed engineers.
• Digital photographs . Answer: Can be altered and are not admissible in
court.
• Cause of an explosion . Answer: Not typically a cause.
• Mechanical failure . Answer: A failure in machinery that can lead to
accidents or incidents.
• Dust accumulation . Answer: The buildup of dust that can contribute to
fire hazards.
• Electrical short . Answer: A fault in an electrical circuit that causes a
current to flow along an unintended path.
• Radiation leakage . Answer: The unintended release of radiation from a
source.
• Multimeter . Answer: A tool typically used to evaluate circuit integrity.
• Bias . Answer: A tendency to favor one perspective over others, which
a fire investigator must avoid.
• Ventilation . Answer: The process that can affect fire pattern
appearance.
