What type of substances are considered flammable?

Prepare for the IFSAC Hazardous Materials Exam. Use flashcards and multiple-choice questions. Each question is equipped with hints and explanations to enhance learning and ensure exam success.

Flammable substances are characterized by their ability to ignite easily when exposed to sources of heat, flames, or sparks. This means that these materials have a low flash point, which is the temperature at which they can vaporize sufficiently to form an ignitable mixture with air. The defining feature of flammable materials is their readiness to catch fire, making choice B the most accurate description.

Substances that are stable at room temperature, as mentioned in the first choice, may not necessarily be flammable. Stability does not equate to flammability; a substance can be stable yet still ignite under certain conditions.

The third option talks about compounds that do not react with air, which does not accurately describe flammable materials. Many flammable substances can react with air and produce flammable vapors, thus posing a fire hazard.

Lastly, products that require high temperatures for ignition, referenced in the fourth choice, are typically classified as non-flammable or less flammable, since they need higher energy input to ignite. In summary, choice B correctly identifies the nature of flammable substances by highlighting their susceptibility to ignition when confronted with heat or sparks.

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