What weight of material triggers the need for a dangerous placard?

The correct answer is based on the regulations regarding the transport of hazardous materials. A dangerous placard is typically required when the total weight of certain hazardous materials reaches 1,000 pounds or more. However, option B specifically refers to the metric ton, which is roughly equal to 2,205 pounds. This figure is significant because it aligns with international standards for transporting hazardous materials that categorize the need for placarding based on the weight of materials being transported.

While 1,000 pounds is a threshold that indicates the need for placarding in many scenarios, the weight that triggers a dangerous placard according to regulations often cited in hazardous materials handling and transportation relates to 2,205 pounds for specific classifications of materials, like those regulated under the international system. This weight reflects a broader compliance with laws that govern the transportation of dangerous goods, ensuring safety during road transport.

In this context, the other weight options do not accurately match the regulatory benchmarks usually associated with placarding requirements under these international standards.