Placards are required for shipments meeting placard thresholds. Which statement is correct?

• A. Placards are required only for air shipments.
• B. Placards are optional for domestic shipments.
• C. Placards are required for all shipments meeting placard thresholds.
• D. Placards are required for all shipments regardless of quantity.

Answer: (D)

Placards are a visual warning used on vehicles and freight containers carrying hazardous materials to alert others to the risk. The requirement to display placards is not automatic for every hazmat load; it applies only when the shipment meets the placard thresholds set by regulations. If the total quantity of hazardous material in the shipment reaches or exceeds those thresholds, a placard must be placed on the vehicle or container. If the shipment is below those thresholds, or is otherwise exempt, no placard is required. Therefore, the statement that placards are required for all shipments regardless of quantity isn’t generally accurate; the correct principle is that placards are required for shipments meeting placard thresholds, with exceptions for certain small or exempt quantities.