CDL Hazardous Materials Endorsement (HME)Loading and Unloading Hazardous MaterialsEasy
A driver is preparing to load a cargo tank with a Class 3 Flammable Liquid. According to regulations, what is the maximum speed at which the product can flow into the tank during the initial fill phase?
- AThe flow rate must be restricted to prevent static electricity buildup.
- BThere are no specific speed restrictions for initial filling.
- CIt depends on the specific gravity of the liquid.
- DThe tank can be filled at the maximum pump capacity.
Show answer & explanationAnswer & explanation
Correct answer: A. The flow rate must be restricted to prevent static electricity buildup.
During the initial filling of a cargo tank with flammable liquids, the flow rate must be restricted to prevent the generation of static electricity, which can cause ignition. This is a critical safety measure.
Why the other options are wrong
- B. This is incorrect; specific restrictions exist to prevent static electricity.
- C. Specific gravity is a factor in tank capacity, but not primarily in initial flow rate for static prevention.
- D. Filling at maximum pump capacity during the initial phase is dangerous due to static electricity risk.
Flammable Liquid Loading Speed
When loading cargo tanks with Class 3 Flammable Liquids, the initial flow rate must be restricted to prevent hazardous static electricity buildup.
- Applies to Class 3 Flammable Liquids.
- Restricted flow prevents static discharge.
- Crucial for preventing ignition during filling.
Memory trick: Static Sparks Danger, Slow Start Safely.