You finish delivering a placarded load and the trailer is now empty. Before picking up a non-hazmat load next, what should you do about the placards?
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Correct!
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Correct answer to question 26 (Hazardous Materials): Remove or cover the placards once the vehicle no longer contains the hazardous material requiring them
Why
Placards communicate what's currently on the vehicle, so once the hazardous material that required them is gone, leaving them up would misinform anyone reading them, including responders.
Updated: November 2026