IMO type 7 cryogenic intermodal containers have pressure ratings up to 600 psi.

• A. 100 psi
• B. 600 psi
• C. 0 psi
• D. 3000 psi

Answer: (B)

Understanding how pressure ratings work is key here. An IMO Type 7 cryogenic intermodal container is built to withstand a maximum internal pressure—its design pressure—so it can safely hold cryogenic liquids under varying conditions. For these containers, that design pressure is up to 600 psi. This means the container, including its fittings, walls, and safety devices, is engineered to hold pressure up to that level without failure, with relief systems in place to vent excess pressure if needed.

Why not the other values? A pressure of 0 psi isn’t realistic for a container meant to carry or contain gas/liquid; some positive pressure is expected and managed. Values like 100 psi or 3000 psi do not match the standard design specification for this type of container, whereas 600 psi reflects the intended maximum safe pressure.