CDL Hazardous Materials Endorsement (HME)Communication RulesEasy
A driver is transporting a cylinder containing UN1070, Nitrous Oxide, Class 2.2, in a non-bulk quantity. The cylinder has a label for Class 2.2. What other specific marking, if any, is required on the cylinder itself?
- AThe ERG guide number
- BThe identification number 'UN1070'
- CThe words 'NON-FLAMMABLE GAS'
- DNo other specific marking is required beyond the label and proper shipping name.
Show answer & explanationAnswer & explanation
Correct answer: B. The identification number 'UN1070'
All hazardous materials packages, including cylinders, must be marked with the identification number (UN or NA number) of the material, in addition to the proper shipping name and hazard labels.
Why the other options are wrong
- A. The ERG (Emergency Response Guidebook) guide number is typically on shipping papers or emergency response information, not directly on the package.
- C. While Nitrous Oxide is a non-flammable gas, the words 'NON-FLAMMABLE GAS' are part of the placard description, not a required marking on a non-bulk cylinder.
- D. This is incorrect; the identification number is a required marking.
Hazardous Materials Package Identification Number Marking
Packages containing hazardous materials must be marked with the appropriate identification number (UN or NA number) for the material.
- Mandatory for almost all hazardous material packages.
- Must be durable and visible.
- Provides immediate identification of the material.
Memory trick: For every 'HazMat Box', know its 'ID Number'!