A railcar tanker with a stencil marking of DOT 111 is a(n):

A railcar tanker with a stencil marking of DOT 111 is a(n):

• A. Pressurized railcar
• B. Non-pressurized railcar
• C. Tank car with fixed roof
• D. Bubble top railcar

Answer: (B)

DOT 111 on a railcar stencil identifies a non-pressurized tank car designed to carry liquids. That designation tells you the car isn’t built to contain internal pressure, which is the key differentiator from pressurized designs. The roof style isn’t determined by the DOT 111 marking, so you can have different top designs on these cars, but the important point for this code is the lack of internal pressure. So the best answer is that it’s a non-pressurized railcar. The other options describe roof configurations or pressurization, which aren’t defined by the DOT 111 stencil.

DOT 111 on a railcar stencil identifies a non-pressurized tank car designed to carry liquids. That designation tells you the car isn’t built to contain internal pressure, which is the key differentiator from pressurized designs. The roof style isn’t determined by the DOT 111 marking, so you can have different top designs on these cars, but the important point for this code is the lack of internal pressure. So the best answer is that it’s a non-pressurized railcar. The other options describe roof configurations or pressurization, which aren’t defined by the DOT 111 stencil.