Class A explosives must not be transported in which type of vehicle?

Class A explosives are the most hazardous type of explosives and pose significant risks during transport. The regulations set forth in the Code of Federal Regulations (CFR) specify stringent guidelines for the transportation of these materials to ensure safety and minimize the potential for accidents.

Transporting Class A explosives in a placarded cargo tank is prohibited primarily due to the high risk associated with transporting such dangerous materials in tanks that can be subjected to various pressures and conditions. Cargo tanks are often designed for liquids and are not equipped to handle the volatile nature of Class A explosives, increasing the likelihood of a serious incident, such as an explosion or fire.

The other options may not have the same inherent risks associated with them in the context of transporting Class A explosives. Therefore, the decision to restrict the transportation of these materials to non-cargo tank vehicles is based on safety protocols aimed at protecting not only the transporters but also the public and the environment from potential hazards linked to the mishandling or accidental discharge of explosives.