Which is a Class 4 placard subcategory?

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Prepare for the Alabama Fire College HAZMAT Technician Test with flashcards and multiple choice questions. Each question includes hints and detailed explanations. Ensure your readiness for the exam!

Multiple Choice

Which is a Class 4 placard subcategory?

Explanation:
Class 4 covers flammable solids and related hazards, including subcategories that identify specific behaviors of those solids. Within this class, 4.1 refers to flammable solids, and self-reactive materials are a subset of that 4.1 category. A self-reactive substance can undergo a self-accelerating exothermic reaction, meaning it can ignite or cause a fire without an external ignition source. That makes it a Class 4 placard subcategory. The other options describe hazards from different classes: oxidizers are Class 5.1, flammable liquids are Class 3, and flammable gas is Class 2.1, so they are not Class 4 placards.

Class 4 covers flammable solids and related hazards, including subcategories that identify specific behaviors of those solids. Within this class, 4.1 refers to flammable solids, and self-reactive materials are a subset of that 4.1 category. A self-reactive substance can undergo a self-accelerating exothermic reaction, meaning it can ignite or cause a fire without an external ignition source. That makes it a Class 4 placard subcategory.

The other options describe hazards from different classes: oxidizers are Class 5.1, flammable liquids are Class 3, and flammable gas is Class 2.1, so they are not Class 4 placards.

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