CDL Hazardous Materials Endorsement (HME)Hazardous Materials RegulationsEasy
A driver is transporting a bulk quantity of UN1789, Hydrochloric acid (Class 8, PG II). What specific placard is REQUIRED on the vehicle?
- ADANGEROUS placard.
- BCORROSIVE placard.
- CFLAMMABLE placard.
- DPOISON placard.
Show answer & explanationAnswer & explanation
Correct answer: B. CORROSIVE placard.
Hydrochloric acid is classified as a Class 8, Corrosive material. When transporting a bulk quantity of any Table 1 or Table 2 hazardous material, the specific placard corresponding to its primary hazard class is required. Therefore, a CORROSIVE placard is required for Hydrochloric acid.
Why the other options are wrong
- A. A DANGEROUS placard is used for mixed loads of Table 2 materials in non-bulk packages, not for a single bulk material.
- C. Hydrochloric acid is not a flammable material (Class 3).
- D. Hydrochloric acid is corrosive, not primarily poisonous (Class 6.1 or 2.3).
Bulk Placarding (Specific Class)
When transporting a bulk quantity of a hazardous material, the specific placard corresponding to its primary hazard class is always required, regardless of weight thresholds for non-bulk packages.
- Bulk packaging includes cargo tanks, portable tanks, rail tank cars, etc.
- Specific placard required for the primary hazard class.
- Table 1 materials always require their specific placard.
- Table 2 materials in bulk also require their specific placard.
Memory trick: Bulk means specific, no 'dangerous' fakes, show the real class for safety's sakes.