CDL Hazardous Materials Practice Test

In the context of hazardous materials, “flammable” refers to a substance that ignites easily and burns persistently. This definition highlights two critical characteristics of flammable materials: their ability to catch fire quickly when exposed to an ignition source and their tendency to sustain burning once ignited. Flammability is a significant concern in transportation and handling, as it poses risks not only of fire but also of potential explosions in certain cases.

The focus on ease of ignition and persistent burning establishes a clear understanding of the dangers associated with flammable materials. These substances can include a variety of liquids, gases, and solids that potentially pose serious hazards during transportation, storage, or use. Understanding flammability helps in implementing proper safety measures and protective equipment to prevent accidents.

The other definitions provided relate to different types of hazards. Substances that change color do not necessarily indicate flammability, while those that can explode relate to explosive materials rather than just flammable ones. Corrosive materials, on the other hand, can cause destruction through chemical reactions but are unrelated to ignitability. Thus, option B accurately captures the essence of what it means for a substance to be labeled as flammable.