Certified Fire Investigator Practice Exam

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What does ANFO stand for in explosives terminology?

A mixture of ammonium nitrate and fuel oil
A type of firework
A safety device for explosives
A term for bomb components

The correct answer is: A mixture of ammonium nitrate and fuel oil

ANFO stands for a mixture of ammonium nitrate and fuel oil, which is a widely used type of explosive. This explosive formulation is favored in various industries, particularly in mining and quarrying, due to its cost-effectiveness and stability. The ammonium nitrate acts as an oxidizer, while the fuel oil provides the energy source needed for detonation. This combination creates a powerful explosion when initiated properly. Understanding the composition and properties of ANFO is essential for fire investigators, as it helps in identifying explosive residues at a fire scene and assessing potential hazards. The other options do not accurately describe ANFO. A type of firework or a safety device for explosives might refer to different categories within pyrotechnics or demilitarization, while bomb components are a more general term that does not specify the unique characteristics or formulation of ANFO itself.