What container is typically a smaller diameter and has reinforcement rings around the sides?

• A. DOT 312
• B. IM-101
• C. Ton container
• D. Intermodal container

Answer: (A)

A container with reinforcement rings around the sides and a smaller diameter is characteristic of a steel drum used for hazardous liquids. Those horizontal rings, or beads, strengthen the wall and help prevent bulging during handling or pressure changes. This design is typical of a DOT 312 drum, which is a smaller-diameter steel drum used for shipping liquids. The other options describe much larger or differently shaped containers—IM-101 tanks, intermodal shipping containers, and ton containers—so they don’t fit the description of a small-diameter drum with rings.