What is the maximum weight of a cylinder that car or van can transport without a vapor tight partition?

The maximum weight of a cylinder that a car or van can transport without requiring a vapor-tight partition is directly concerned with adhering to safety regulations regarding the transport of liquefied petroleum gas (LP-gas). The correct response reflects current regulations, which stipulate that the weight limit for safely transporting LP-gas without additional safety measures, such as a vapor-tight partition, is set to ensure the safety of both passengers and the environment.

Transporting cylinders beyond this specified weight can lead to hazardous situations, including potential leaks and the associated risks of fire or explosion. Therefore, adhering to the weight limit is critical for maintaining safety standards during transport. This specific weight limit is established in guidelines that govern the safe transportation of hazardous materials.

In this context, the other options present higher weights than the established limit. Following best practices ensures that safety is prioritized in various scenarios, including transportation guidelines for flammable gases.