HAZMAT CDL Practice Test 2025 – All-In-One Resource to Ensure Exam Success!

A hazardous material classified under class number 1 signifies explosives, which are substances that can undergo rapid decomposition, potentially producing gas and heat, and sometimes resulting in an explosion. This classification inherently carries a high level of risk due to the volatile nature of explosives and their capacity to cause significant harm if not handled or transported properly. The associated risks include severe injury, property damage, and environmental impact.

The classification system for hazardous materials is designed to communicate and categorize the level of danger posed by different substances. Class number 1 indicates that the materials within this category require strict regulations for handling, packaging, and transportation to ensure safety. In contrast, lower class numbers or non-hazardous materials pose less severe risks, making the classification extremely critical for those involved in transportation and related industries.