NAFI Certified Fire and Explosion Investigator (CFEI) Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the NAFI Certified Fire and Explosion Investigator (CFEI) Vocabulary Games
4 free word games built on 20 NAFI Certified Fire and Explosion Investigator (CFEI) terms across 10 topics. Every game deals terms at random and shows what each term means, so you can keep playing as long as you like.
How to Play
- 1.Read the clue and type the term (3 to 6 letters).
- 2.Green: right spot. Yellow: wrong spot. Gray: not in the term.
- 3.Solve it in 6 tries, then read the explanation.
- 1.Swap two neighboring tiles to line up 3 of the same term.
- 2.Longer lines, two lines at once and chains score more.
- 3.Play until no swap can make a line.
- 1.Flip two cards. A matching pair stays face up.
- 2.Each pair you find shows what the term means.
- 3.Clear the board in as few moves as you can.
- 1.Find each listed term in the letter grid.
- 2.Drag across its letters: across, down or diagonally.
- 3.Find all five as fast as you can.
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Topics in the NAFI Certified Fire and Explosion Investigator (CFEI) Vocabulary Game
Fire science
Fire behavior
Fire patterns
Fire classification
Cause determination
Evidence collection
Electrical investigation
Building systems
Legal considerations
Investigation methodology
Sources for these terms (6)
- NFPA 921 Public Comment Report (2024 edition cycle) · Source checked 2026-11-06
- Tentative Interim Amendment 24-2 to NFPA 921, 2024 Edition · Source checked 2026-11-06
- Fire and Arson Scene Evidence: A Guide for Public Safety Personnel · Source checked 2026-11-06
- 29 CFR 1910.106 — Flammable liquids · Source checked 2026-11-06
- Michigan v. Tyler, 436 U.S. 499 (1978) · Source checked 2026-11-06
- Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993) · Source checked 2026-11-06
About the CFEI Exam
The CFEI (Certified Fire and Explosion Investigator) is the fire and explosion investigator certification awarded by NAFI. NAFI's CFEI Guidelines state that all questions on the 100-question closed-book exam are based on the current NFPA 1033 and taken from the current NFPA 921, Guide for Fire and Explosion Investigations; study areas include fire science, fire behavior, origin determination, cause determination, evidence collection, electrical investigation, building systems, legal considerations, and investigative methodology.
Exam sponsor: NAFI (National Association of Fire Investigators). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
120 minutes
Passing Score
75% (75 of 100 questions)
Exam / Certification Fees
$135 application fee (plus required NAFI membership, $60 per year)
Exam sponsor websiteReported exam pass rate: Not publicly disclosed. NAFI does not publish pass rate data Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the CFEI vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How do the CFEI vocabulary games work?
There are 4 games built on 20 CFEI terms. In Guess the Term, a clue describes one term and you have six tries to spell it, with green, yellow and gray letters showing how close you are. In Term Match, six terms appear as colored tiles; swap neighbors to line up three or more of the same term, and each match shows what the term means. In Term Pairs, twelve face-down cards hide six pairs of terms; flip two at a time to find each pair, and every pair you find shows what the term means. In Term Search, five terms hide in a grid of letters, reading across, down or diagonally; drag across a term to circle it, and each term you find shows what it means.
Where do the CFEI terms come from?
OpenExamPrep researched each term from the NAFI (National Association of Fire Investigators) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What is the CFEI certification?
The Certified Fire and Explosion Investigator (CFEI) is a professional certification from NAFI (National Association of Fire Investigators). It recognizes qualified professionals who investigate fire, arson, and explosion incidents. The certification is based on NFPA 921 scientific principles.
What is on the CFEI exam?
The CFEI exam consists of 100 randomly selected multiple-choice and true/false questions drawn from a pool maintained by the National Certification Board. All questions are based on NFPA 921 (Guide for Fire and Explosion Investigations) and NFPA 1033 (Standard for Professional Qualifications for Fire Investigator). The exam is closed-book with a 2-hour time limit.