CDL Hazardous Materials Endorsement (HME)Communication RulesMedium
A driver is transporting a shipment of UN2920, Corrosive liquid, flammable, N.O.S., Class 8, (subsidiary hazard Class 3), PG II. The material is in non-bulk packages. Which of the following statements about labeling these packages is correct?
- ANo labels are required if the packages are marked with the proper shipping name and identification number.
- BBoth the Class 8 (Corrosive) and Class 3 (Flammable Liquid) labels are required.
- COnly the Class 3 (Flammable Liquid) label is required, as it is the subsidiary hazard.
- DOnly the Class 8 (Corrosive) label is required.
Show answer & explanationAnswer & explanation
Correct answer: B. Both the Class 8 (Corrosive) and Class 3 (Flammable Liquid) labels are required.
When a hazardous material has both a primary and a subsidiary hazard, both the primary hazard label and the subsidiary hazard label must be displayed on the package. In this case, Class 8 is primary and Class 3 is subsidiary.
Why the other options are wrong
- A. Labels are generally required for hazardous materials packages, regardless of other markings, unless specific exceptions apply (which is not the case here).
- C. This is incorrect; the primary hazard label is always required, and the subsidiary is also required if applicable.
- D. This is incorrect; both primary and subsidiary hazard labels are needed.
Primary and Subsidiary Hazard Labeling
Packages containing hazardous materials with both a primary and a subsidiary hazard must display labels for both hazards.
- Primary label identifies the main danger.
- Subsidiary label identifies additional significant dangers.
- Both labels must be clearly visible on the package.
Memory trick: For 'Double Trouble', show 'Both Labels'!