How many placards must be displayed on a vehicle that requires placarding under the federal HMR?

Practise this CDL HazMat Endorsement question free, then download the PDF, watch the video walkthrough, or unlock timed mock exams for the full web bank.

Download PDF Watch video

Multiple choice — select the best answer

AOne, on the rear of the vehicle only
BThree, one on each side and one on the rear
CTwo, one on each side of the vehicle
DFour, one on each side, one on the front, and one on the rear

✓ Correct answer: D. Four, one on each side, one on the front, and one on the rear 49 CFR 172.516 requires four placards — one on each side and one on each end (front and rear) — so the hazard class is visible from any approach direction.

.q-expl{display:block!important}.q-opt[data-idx="3"]{border-color:#16a34a;background:#f0fdf4}.q-opt[data-idx="3"] .oltr{background:#16a34a;color:#fff}.q-opt{cursor:default!important;pointer-events:none}

Keep practising. Use the free CDL HazMat Endorsement PDF, watch the YouTube walkthrough, or unlock all 10 web questions with timed mock exams.

Free PDF Video walkthrough

← Previous Next → 🎲 Random question ↩ Back to all questions

Keep practising

How many placards must be displayed on a vehicle that requires placarding under the federal HMR?

Related questions

Free practice here. Timed mocks when you are ready.