If a placard is visible but no product name or four-digit UN number is given, how can you determine which ERG guide page to use?

• A. Use the orange section
• B. Check the green section
• C. Refer to the UN number on the packaging
• D. The table of placards lists guide numbers

Answer: (D)

When you only have a placard to go on, the way to pick the correct ERG page is to use the table of placards. That table lists, for each placard symbol and hazard, the corresponding guide number. You match the visible placard to an entry in that table, read off the guide number, and then turn to the ERG page that corresponds to that guide number for the initial emergency response information. This works even without a product name or four-digit UN number because the placard itself provides the hazard cue used to select the right guide page.

The other options don’t fit because a UN number on packaging isn’t available in this scenario, and simply knowing the orange or green section isn’t enough without the guide number you obtain from the placard table. The table of placards is specifically designed for this exact situation, translating a placard into the correct guide page.