HAZMAT CDL Practice Test

What should be done with cargo tanks after delivery?

1. They should be returned empty

2. The valves should remain open

3. They should be cleaned immediately

4. They can be loaded without inspection

The correct answer is: They should be returned empty

Returning cargo tanks empty after delivery is essential for several reasons. First, empty tanks ensure that there is no residue left that could pose a risk for contamination or reaction with future cargoes. This practice enhances safety by reducing the potential for hazardous material spills or leaks during transport. Additionally, having empty tanks allows for easier inspections and maintenance. It is vital for the integrity of the tank that it is routinely checked for wear and damage, something that is more easily assessed when the tank is not carrying any load. Moreover, emptying tanks also complies with regulations and industry standards designed to maintain the highest level of safety in the transportation of hazardous materials. It prevents situations where residual materials could react with new cargo or create hazardous conditions during the loading process. The other options imply practices that could either compromise safety or violate regulatory requirements. Keeping the valves open, for instance, does not prevent contamination and can lead to leaks or spills. Cleaning should be done but is often most effective under controlled conditions rather than immediately after delivery, and not inspecting tanks before loading can lead to serious safety hazards.