CFI IAAI Exam 2025/2026 – 100+ Practice Questions with Answers | Fire Dynamics, Heat Transfer & Thermochemistry | Fire Investigator Certification – International Association of Arson Investigators

This document is a fully updated exam preparation resource for the Certified Fire Investigator (CFI) credential under the International Association of Arson Investigators (IAAI), designed for the 2025/2026 exam cycle. It includes over 100 practice questions with accurate answers, covering the technical, scientific, and analytical principles essential for fire investigation professionals. Key topics include energy and power fundamentals, radiant heat flux, flashover behavior, gas laws (Avogadro’s Law, Raoult’s Law), and critical thermodynamic processes such as pyrolysis, stoichiometry, and heat release rate. Learners will also engage with material covering vapor pressure, flammability limits, combustion chemistry, and solid-state behaviors (e.g., metals, polymers, and refractories). This document also explores endothermic and exothermic reactions, flame types (diffusion, premixed), and mechanisms of flame spread through radiation and surface burning—concepts that are central to understanding how and why fires initiate, spread, and behave under various conditions. Ideal for candidates pursuing the CFI-IAAI certification, this material is also highly valuable to students and professionals in Fire Science, Forensic Investigation, Mechanical and Chemical Engineering, Public Safety, and Criminal Justice. It serves as a practical study guide for fire investigators, fire protection engineers, and forensic analysts involved in cause and origin determination, scene reconstruction, and expert testimony preparation. Each question is paired with concise, exam-aligned answers that reinforce both theoretical knowledge and applied problem-solving skills critical for fieldwork and certification success. Keywords: CFI, IAAI, fire investigation, flashover, radiant heat flux, energy and power, stoichiometry, vapor pressure, fire dynamics, flame spread, pyrolysis, combustion chemistry, Avogadro's law, Raoult's law, Certified Fire Investigator, thermochemistry, heat transfer, gas behavior, endothermic reactions, forensic fire science