CDL Hazardous Materials Endorsement (HME)Hazardous Materials RegulationsMedium
A driver is transporting a shipment that includes 800 pounds of UN1830, Sulfuric acid (Class 8, PG II), and 300 pounds of UN1760, Corrosive liquid, N.O.S. (Class 8, PG III). Which of the following statements about placarding is correct?
- AThe vehicle requires a specific placard for Sulfuric Acid and a DANGEROUS placard for the N.O.S. material.
- BThe vehicle does not require placards because no single material meets the 1,001-pound threshold.
- CThe vehicle requires DANGEROUS placards on all four sides.
- DThe vehicle requires CORROSIVE placards on all four sides.
Show answer & explanationAnswer & explanation
Correct answer: D. The vehicle requires CORROSIVE placards on all four sides.
Both materials are Class 8 (Corrosive). When multiple materials from the same hazard class, not listed in Table 1, exceed 1,001 pounds in aggregate, the vehicle must be placarded with the specific placard for that class.
Why the other options are wrong
- A. Specific placards are used for a class when the aggregate weight of that class exceeds 1,001 pounds, not individual placards for each material if they are the same class.
- B. The combined weight exceeds 1,001 pounds, so placards are required.
- C. DANGEROUS placards are used when mixed loads of Table 2 materials exceed 1,001 pounds and don't meet specific placarding rules for a single class.
Mixed Table 2 Placarding (Same Class)
If a vehicle carries multiple hazardous materials from the same hazard class (not from Table 1) and their combined weight exceeds 1,001 pounds, the vehicle must display the specific placard for that hazard class.
- Applies to materials listed in Placarding Table 2.
- If multiple materials belong to the same hazard class.
- Aggregate gross weight of that class exceeds 1,001 pounds.
- Display the specific placard for that single hazard class (e.g., CORROSIVE, FLAMMABLE).
Memory trick: Total up the same, then placard the name.