Certified Safety Professional Exam 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 445

Which class includes flammable solids that are dangerous when wet?

Class 2

Class 4

The classification you're referring to is correct. Class 4 materials encompass flammable solids that can become hazardous when they come into contact with water. This class is divided into several divisions, with one specifically addressing flammable solids that can ignite spontaneously or undergo combustion when exposed to moisture. These materials pose significant risks not only because they can ignite, but also due to the reactions they may have with water, which might exacerbate their flammability or create other dangerous conditions. Understanding this classification is essential for safe handling and transportation of materials, ensuring that individuals who work with these substances are aware of their properties and associated risks.

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Class 5

Class 6

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