Hazardous Materials Class 4 includes which category?

Hazardous Materials Class 4 includes which category?

• A. Explosives
• B. Gases
• C. Oxidizer
• D. Flammable Solid

Answer: (D)

Class 4 is the group for materials that are flammable in solid form, and it includes three divisions: flammable solids, substances that are spontaneously combustible, and substances that emit flammable gases when in contact with water. The category that sits under Class 4 is Flammable Solid, which is why that choice is correct. The other options refer to different hazard classes—Explosives belong to Class 1, Gases to Class 2, and oxidizers are typically Class 5.1.

Class 4 is the group for materials that are flammable in solid form, and it includes three divisions: flammable solids, substances that are spontaneously combustible, and substances that emit flammable gases when in contact with water. The category that sits under Class 4 is Flammable Solid, which is why that choice is correct. The other options refer to different hazard classes—Explosives belong to Class 1, Gases to Class 2, and oxidizers are typically Class 5.1.