CDL Hazardous Materials Endorsement (HME)Bulk Tanks and Other ContainersEasy
A driver is transporting a bulk shipment of a hazardous material that is a liquid with a flash point of 65°F (18.3°C). Which DOT hazard class applies to this material?
- AClass 9 Miscellaneous Hazardous Material
- BClass 3 Flammable Liquid
- CClass 2 Flammable Gas
- DClass 4 Flammable Solid
Show answer & explanationAnswer & explanation
Correct answer: B. Class 3 Flammable Liquid
A flammable liquid, according to DOT regulations (49 CFR 173.120), is a liquid having a flash point of not more than 140°F (60°C). Since 65°F is less than 140°F, it is a Class 3 Flammable Liquid.
Why the other options are wrong
- A. Class 9 is for materials that don't fit into other classes, and a flammable liquid has a specific class.
- C. Flammable gases are not liquids and have different flash point criteria.
- D. Flammable solids are not liquids and have different classification criteria.
Flammable Liquid Definition
A flammable liquid is a liquid having a flash point of not more than 140°F (60°C), as defined by DOT hazardous materials regulations (49 CFR 173.120).
- Flash point <= 140°F (60°C).
- Includes some liquid mixtures with flammable components.
- Ignites easily at ambient temperatures.
Memory trick: If it's a liquid and flashes below sixty Celsius (140 F), it's a 'Class 3' fiery liquid.