Which placard feature aids hazard recognition?

• A. The UN hazard class number
• B. The shipping route
• C. The carrier's name
• D. The destination port

Answer: (A)

Hazard recognition on placards relies on the hazard class number shown on the sign. That number identifies the general type of danger (such as flammable, corrosive, or toxic) and tells you the appropriate precautions and response actions you should take right away, even if you don’t know the exact substance. This quick cue is why it’s the best feature for recognizing hazards from a placard. The other details—shipping route, carrier’s name, and destination port—are about logistics and do not convey the hazard type you need to know in an emergency.