In which scenario should the engine remain on during cargo loading?

The engine should generally be turned off during cargo loading to ensure the safety of all personnel involved and to minimize the risk of accidents or incidents. Keeping the engine running can introduce unnecessary hazards, such as the potential for fire or equipment malfunction. In addition, idling engines can create exhaust fumes that may pose a health risk to workers nearby.

While there may be scenarios in some specific industries where the engine might need to remain on for certain operations, the safest practice advocated in most situations is to have the engine turned off during the loading process. This reduces risks and ensures a safer working environment.

In contrast, under certain operational circumstances, like during pump operation or emergency procedures, one might consider keeping the engine on; however, these situations are typically exceptions rather than the rule. The practice of always keeping the engine off during loading reinforces the emphasis on safety and operational best practices in cargo handling.