How many classes are there in dangerous goods regulations?

How many classes are there in dangerous goods regulations?

• A. 10 classes
• B. 7 classes
• C. 9 classes
• D. 8 classes

Answer: (C)

The question tests how dangerous goods are organized by hazard into distinct groups. In the standard transport regulations, dangerous goods are categorized into nine classes based on their primary hazard: explosives; gases; flammable liquids; flammable solids; oxidizing substances and organic peroxides; toxic and infectious substances; radioactive materials; corrosives; and miscellaneous dangerous goods. That nine-class structure is used in the common frameworks for air, road, and sea transport (such as the IATA DGR and UN Model Regulations). So there are nine classes, which is why nine is the correct count. The other numbers don’t match this established classification.

The question tests how dangerous goods are organized by hazard into distinct groups. In the standard transport regulations, dangerous goods are categorized into nine classes based on their primary hazard: explosives; gases; flammable liquids; flammable solids; oxidizing substances and organic peroxides; toxic and infectious substances; radioactive materials; corrosives; and miscellaneous dangerous goods. That nine-class structure is used in the common frameworks for air, road, and sea transport (such as the IATA DGR and UN Model Regulations). So there are nine classes, which is why nine is the correct count. The other numbers don’t match this established classification.