When loading explosives or flammables, what should the status of the engine be?

When loading explosives or flammables, the engine should always be off. This minimizes the risk of ignition from engine components such as exhaust gases, electrical sparks, or potential leaks. An engine running can produce heat and vibrations, both of which can create hazardous conditions when dealing with materials that are sensitive to ignition. By ensuring the engine is off, safety measures are reinforced, reducing the likelihood of accidents during loading operations. The choice to have the engine off is a critical safety protocol in handling such dangerous materials, prioritizing the well-being of individuals and property nearby.