A technician is loading packages of Class 4.1 (Flammable Solids) and Class 5.1 (Oxidizers) onto the same transport vehicle. According to the segregation requirements, which of the following practices is allowed?
- ALoading them together in the same stack if separated by a non-hazardous material barrier.
- BLoading them in the same vehicle, provided they are not loaded in the same freight container.
- CLoading them in the same vehicle if they are separated by a minimum distance of 3 feet.
- DLoading them in the same vehicle without any separation if properly secured.
Show answer & explanationAnswer & explanation
Correct answer: B. Loading them in the same vehicle, provided they are not loaded in the same freight container.
Flammable Solids (Class 4.1) and Oxidizers (Class 5.1) are generally incompatible because oxidizers can greatly increase the intensity of a fire involving flammable solids. They are prohibited from being loaded together in the same freight container. However, they can be transported on the same transport vehicle if they are not in the same freight container (e.g., one in a container, the other loose or in a different container on the same flatbed).
Why the other options are wrong
- A. A non-hazardous barrier is insufficient to overcome the incompatibility between these two classes.
- C. A 3-foot separation is not the specific segregation requirement for these two classes; the primary rule is against loading in the same freight container.
- D. Loading them together without separation is strictly prohibited due to their incompatibility.
Segregation: Flammable Solids & Oxidizers
Class 4.1 (Flammable Solids) and Class 5.1 (Oxidizers) are incompatible and have specific segregation rules when transported together.
- Class 4.1 and Class 5.1 are incompatible.
- Prohibited from same freight container.
- Permitted on same vehicle if not in same container.
Memory trick: Flammable solids and oxidizers are like oil and fire; keep them apart, especially in a box.