The DOT hazard class 1 includes:

The DOT hazard class 1 includes:

• A. Nonhazardous materials
• B. Explosives
• C. Gases under pressure
• D. Corrosives

Answer: (B)

Explosives are classified by DOT as the first hazard class because they are materials that can detonate or rapidly release energy, causing a powerful explosion. This grouping covers substances and devices designed to explode, and it drives strict handling, packaging, segregation, and transport rules to protect people and property. Other options don’t fit because they belong to different hazard classes: gases under pressure are Class 2, which focuses on compressed or liquefied gases; corrosives are Class 8, which includes substances that cause severe damage to skin or metals; nonhazardous materials aren’t assigned to a hazmat class.

Explosives are classified by DOT as the first hazard class because they are materials that can detonate or rapidly release energy, causing a powerful explosion. This grouping covers substances and devices designed to explode, and it drives strict handling, packaging, segregation, and transport rules to protect people and property.

Other options don’t fit because they belong to different hazard classes: gases under pressure are Class 2, which focuses on compressed or liquefied gases; corrosives are Class 8, which includes substances that cause severe damage to skin or metals; nonhazardous materials aren’t assigned to a hazmat class.