CDL Hazardous Materials Endorsement (HME)Bulk Tanks and Other ContainersHard
What is the maximum internal pressure that a DOT Specification 406 cargo tank is designed to withstand during normal operation?
- A10.0 psig
- B2.65 psig
- C25.0 psig
- D5.0 psig
Show answer & explanationAnswer & explanation
Correct answer: B. 2.65 psig
DOT Specification 406 (DOT 406) cargo tanks are non-pressure tanks, primarily designed for transporting flammable and combustible liquids at atmospheric pressure. Their maximum allowable working pressure (MAWP) is 2.65 psig (pounds per square inch gauge).
Why the other options are wrong
- A. This pressure is too high for a standard DOT 406 tank.
- C. This pressure is characteristic of a DOT 407 or DOT 412 pressure tank, not a DOT 406.
- D. This pressure is too high for a standard DOT 406 tank.
DOT 406 Cargo Tank Pressure
The maximum internal pressure a DOT Specification 406 cargo tank is designed to safely withstand during normal transport operations.
- Rated for 2.65 psig (pounds per square inch gauge).
- Used for non-pressure liquids, such as gasoline or fuel oil.
- Designed with elliptical cross-sections for low-pressure liquids.
Memory trick: Four-oh-six, for low-pressure fix, 2.65, that's the mix!