Certified Fire Investigator Practice Exam 2025 - Free Fire Investigator Practice Questions and Study Guide

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.