What must be done to any exposed spark-producing metal in vehicles transporting explosives?

When transporting explosives, it is essential to ensure that any exposed spark-producing metal is adequately addressed to prevent accidents and ensure safety. Covering these metals with wood or a nonsparking material is crucial because it effectively eliminates the risk of sparks igniting the explosives during transport. This measure significantly reduces the chances of a fire or explosion caused by friction or accidental contact between metal surfaces.

Using nonsparking materials is particularly important because these materials are specifically designed to not create sparks or heat when they come into contact with other metals. By covering or insulating exposed metal surfaces, the possibility of dangerous reactions is minimized, thereby ensuring a safer transportation environment for explosive materials.

While painting, removing, or insulating metals might seem like reasonable safety measures, they do not directly address the spark risk in the same effective way that covering with nonsparking materials does.