Construction Health and Safety Technician (CHST) 2025 – 400 Free Practice Questions to Pass the Exam

The classification of explosives as per U.S. Department of Transportation regulations is crucial for safety, transportation, and various regulatory compliance. Each class is defined by the nature and characteristics of the explosives, helping to segment them into groups based on their potential risks and handling requirements.

The correct categorization of Class "D" as mentioned in the answer is indeed not accurate according to the U.S. Department of Transportation regulations. Class "D" is not a recognized category for explosives. Instead, explosives fall into different classes defined as follows:

- Class "A" includes high explosives that detonate and are typically very hazardous.

- Class "B" contains low explosives, which are used mainly for propellant purposes.

- Class "C" covers consumer fireworks that are considered safer and are used in commonly sold items.

Therefore, labeling Class "D" as including fireworks and other minimally hazardous explosives misrepresents the established categories. The U.S. regulatory framework does not provide for a Class "D," making this categorization inaccurate. Understanding the correct classifications helps ensure safer handling and adherence to regulatory requirements when dealing with explosives.