NFPA 921 describes which aspect of fire investigation?

• A. Investigation and methodology
• B. Fire suppression tactics
• C. Meteorological data
• D. Molecular analysis

Answer: (A)

NFPA 921 focuses on the way fire investigations are conducted—the process and method investigators use to determine origin and cause. It provides a structured, scientific approach that guides investigators through steps such as establishing scene safety, collecting and preserving evidence, documenting conditions, analyzing fire patterns, interviewing witnesses, and developing and testing hypotheses. The emphasis is on a repeatable, evidence-based method rather than on how fires are fought, weather data in general, or specialized molecular analyses. While such data or analyses may appear in investigations, NFPA 921’s purpose is to define the investigation process itself.