Motor/mobile fuel containers must be gas tight with respect to what areas?

The correct answer highlights the importance of ensuring that fuel containers for motor or mobile equipment are gas tight, especially regarding driver or passenger compartments and spark-producing equipment. This is critical because any leaks in the fuel system can lead to dangerous situations, including the possibility of fire or explosion.

When considering the driver or passenger compartments, maintaining a gas-tight seal helps prevent harmful vapors from entering the areas where people are located, minimizing the risk of inhalation of toxic gases. Furthermore, proximity to spark-producing equipment, such as the engine or electrical systems, necessitates strict gas-tightness to prevent any sparks from igniting leaked fuel vapors, which could lead to catastrophic results.

While other options may reference various areas of a vehicle, none emphasize the dual risk associated with both the passenger areas and equipment that could produce sparks. Therefore, the focus on protecting driver and passenger compartments alongside equipment that produces sparks makes this answer especially relevant for safe practices in handling LP-gas.