When you place placards on a vehicle, the placard ID number (when applicable) must:
Correct. Bulk packagings and certain shipments require the four-digit UN/NA number on each side and end of the package, on the placard, or on an orange panel.
CDL Practice Question #274
Category: Hazmat
Why this question matters
This question is one of 68 in our Hazmat bank. The reasoning above comes directly from the AAMVA CDL Manual, the source document used by every U.S. state DMV. Memorizing the underlying rule — not just the letter answer — is what separates passing on the first attempt from a return trip and another fee.