Which partial list contains the information you need to determine the correct placards to use?

• A. The material's hazards class, the amount of hazardous materials, and the type of shipment
• B. The material's color, weight, and packaging
• C. The hazard label, last maintenance date, and carrier
• D. The chemical formula, temperature, and owner

Answer: (A)

Determining the correct placards hinges on knowing what hazard you’re signaling, how much material you’re carrying, and under what shipment rules the load falls. The hazard class tells you the specific pictogram and color to display, the quantity sets whether placards are required and how many you need, and the shipment type can change which regulations or exemptions apply. That combination is exactly what lets you choose the proper placards.

Other factors listed don’t determine placards—color, weight, and packaging don’t by themselves decide the correct placard set; a hazard label, maintenance date, or carrier isn’t used to determine placarding; and chemical formula, temperature, or owner aren’t used to determine which placards to display.