Certified Fire Investigator Practice Exam

What does the term oxidizer refer to?

1. A chemical that decreases combustion

2. A substance that increases the rate of fire

3. A material that supports combustion

4. A type of accelerator used in investigations

The correct answer is: A material that supports combustion

The term oxidizer refers to a material that supports combustion. In the context of fire and combustion chemistry, oxidizers are substances that can accept electrons during a chemical reaction, specifically during the process of combustion. This characteristic allows them to facilitate and promote the burning of fuels, making them essential components in many fire scenarios. Oxidizers contribute to the fire's intensity and can cause fuels to ignite more easily, supporting the combustion process even in situations where oxygen levels may be limited. Common examples of oxidizers include oxygen itself, various nitrates, chlorates, and peroxides. Understanding the role of oxidizers is crucial for fire investigators, as it helps them determine the potential causes and accelerants involved in fire incidents.