CDL Hazardous Materials Endorsement (HME)Communication RulesMedium
A driver is transporting a shipment of UN2920, Corrosive liquid, flammable, N.O.S., Class 8, with a subsidiary hazard of Class 3. The non-bulk packages are labeled with both a 'CORROSIVE' label and a 'FLAMMABLE LIQUID' label. Which statement regarding the placement of these labels is correct?
- ABoth labels must be placed adjacent to each other on the same surface of the package.
- BOnly the 'CORROSIVE' label is required, as it is the primary hazard.
- CThe 'FLAMMABLE LIQUID' label must be on the front, and the 'CORROSIVE' label on the back.
- DThe 'CORROSIVE' label must be placed above the 'FLAMMABLE LIQUID' label.
Show answer & explanationAnswer & explanation
Correct answer: A. Both labels must be placed adjacent to each other on the same surface of the package.
When a package requires both a primary and subsidiary hazard label, they must be displayed adjacent to each other (side-by-side or one immediately above the other) on the same surface of the package, near the proper shipping name, to ensure all hazards are immediately visible.
Why the other options are wrong
- B. Both primary and subsidiary hazard labels are required to communicate all significant risks.
- C. Labels must be on the same surface for clear hazard communication, not split between different sides.
- D. There is no specific vertical hierarchy required for primary and subsidiary hazard labels; adjacent placement is the key.
Primary & Subsidiary Label Placement
Both primary and subsidiary hazard labels must be displayed adjacent to each other on the same surface of a package containing hazardous materials.
- Applies when both primary and subsidiary labels are required.
- Labels must be on the same surface of the package.
- Must be adjacent (side-by-side or one above the other).
- Ensures all hazards are clearly communicated.
Memory trick: Side-by-side, on the same face, all labels show their hazard place.