To decide which placards to display, which information is essential?

• A. The material's hazards class, the amount of hazardous materials, and the type of shipment
• B. Campaign date and warehouse code
• C. Carrier's license number and truck model
• D. Destination country and shipment weight

Answer: (A)

Placards are all about communicating the specific dangers you’re carrying. The essential pieces are the material’s hazard class, how much of it you’re transporting, and the kind of shipment. The hazard class tells you which pictograms to show (for example, flammable, toxic, corrosive) and whether more than one placard is needed if the cargo has multiple hazards. The quantity determines whether placards are required at all and how many or what type of placards must be displayed, since some thresholds trigger specific requirements or exemptions. The shipment type matters because certain scenarios (like bulk loads, mixed hazards, or limited/exempt quantities) change the placarding rules and the exact set of signs you must use. The other details—campaign dates, warehouse codes, carrier licenses, truck models, destination country, or shipment weight—don’t govern placard selection and aren’t used to decide which placards to display.