Hazmat Ops - MFRI – Review Questions and Correct Answers 2026/2027

Hazmat Ops - MFRI – Review Questions and Correct Answers 2026/2027 What is the US DOT definition of hazardous materials, as found in 49 CFR? - Correct Answer Hazardous material is a substance or material that is capable of posing an unreasonable risk to health, safety and property when transported in commerce. What is the EPA definition of a hazardous substance? - Correct Answer Any item or chemical which can cause harm to people, plants or animals when released by spilling, leaking, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping, or disposing into the environment. Flash point - Correct Answer The lowest temperature at which a combustible material will produce an ignitable vapor. Ignition temperature - Correct Answer minimum temperature a substance should attain in order to ignite under specific test conditions Boiling point - Correct Answer the temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure Soluble - Correct Answer The ability of a substance to dissolve in water Vapor pressure - Correct Answer liquid held inside of a closed container Vapor density - Correct Answer the weight of an airborne concentration as compared to an equal volume of dry air Specific gravity - Correct Answer the weight of a liquid as compared to water Alpha particle - Correct