CDL Hazardous Materials Endorsement (HME)Loading and Unloading Hazardous MaterialsEasy
A driver is transporting a cargo tank containing Class 2.1 (Flammable Gas). Which of the following actions is PROHIBITED during the loading or unloading process?
- AWearing static-dissipative footwear.
- BRemaining within 25 feet of the cargo tank.
- CUsing a flashlight to inspect connections.
- DOperating a radio transmitter within 25 feet of the cargo tank.
Show answer & explanationAnswer & explanation
Correct answer: D. Operating a radio transmitter within 25 feet of the cargo tank.
Operating radio transmitters, cell phones, or other electronic devices that could generate sparks or electromagnetic interference is prohibited within 25 feet of a cargo tank being loaded or unloaded with flammable materials. This regulation prevents potential ignition sources in the presence of flammable vapors.
Why the other options are wrong
- A. Static-dissipative footwear is recommended or required in many hazardous material handling situations to prevent static electricity buildup, not prohibited.
- B. Remaining within 25 feet during attendance is generally required, not prohibited.
- C. Approved, intrinsically safe flashlights are generally permitted for inspection in hazardous environments.
Prohibited Actions Near Flammable Gas
During loading/unloading flammable gases, avoid any activities that could create an ignition source, such as operating unapproved electronic devices or smoking, within a specified distance.
- Flammable gases are easily ignited.
- Electronic devices can generate sparks or RF energy.
- A 25-foot safety zone is often required around flammable cargo tanks.
Memory trick: No sparks near flammable tanks, keep electronics away.