EPA Section 608 Universal Certification ExamCoreHard
A technician is preparing to ship a recovered refrigerant cylinder containing R-134a. According to DOT regulations, what specific type of label is primarily required for this cylinder?
- AA 'Recycled Refrigerant' label.
- BA 'Non-Flammable Gas' label and a 'Chlorofluorocarbon' label.
- CA 'UN' number label and a hazard class label.
- DAn 'Oxygen Depletion Hazard' label.
Show answer & explanationAnswer & explanation
Correct answer: C. A 'UN' number label and a hazard class label.
DOT regulations for shipping hazardous materials, including recovered refrigerants, require specific labeling. This includes a 'UN' number (e.g., UN1078 for R-134a) to identify the substance and a hazard class label (e.g., Class 2.2 Non-Flammable Gas) to indicate its primary hazard.
Why the other options are wrong
- A. This is not a DOT-mandated shipping label; it describes the refrigerant's status.
- B. While R-134a is a non-flammable gas, the 'Chlorofluorocarbon' label is incorrect as R-134a is an HFC, and the more general 'hazard class' label is required over a specific chemical type.
- D. While ozone depletion is a concern for some refrigerants, it's not a primary DOT shipping hazard label.
DOT Refrigerant Shipping Labels
The Department of Transportation (DOT) requires specific labels for shipping recovered refrigerant cylinders, including a UN (United Nations) number to identify the specific substance and a hazard class label (e.g., Class 2.2 Non-Flammable Gas) to communicate its primary hazard.
- UN number identifies the substance.
- Hazard class label indicates danger.
- Must be visible and correctly affixed.
Memory trick: UN-ique number, hazard known, safely flown.