Which statement about an aluminum DOT MC-306 tanker placarded with 1203 is true?

Which statement about an aluminum DOT MC-306 tanker placarded with 1203 is true?

• A. Cylinders contain gasoline.
• B. Cylinders contain cryogenic materials.
• C. Cylinders contain compressed natural gas.
• D. Cylinders contain liquefied petroleum gas.

Answer: (A)

Placards tell you what hazardous material is being carried and, in many cases, the type of vessel used. The placard 1203 is the DOT identifier for gasoline, a flammable liquid. An aluminum DOT MC-306 tanker is a non-pressurized cargo tank designed to haul liquids like gasoline, not gases stored in cylinders or cryogenic or high‑pressure contents. So the meaningful takeaway is that the tanker is carrying gasoline. The other options point to materials that would require different vessel designs and placards (cryogenic materials, compressed natural gas in high‑pressure cylinders, or liquefied petroleum gas), which don’t match the 1203 gasoline designation.

Placards tell you what hazardous material is being carried and, in many cases, the type of vessel used. The placard 1203 is the DOT identifier for gasoline, a flammable liquid. An aluminum DOT MC-306 tanker is a non-pressurized cargo tank designed to haul liquids like gasoline, not gases stored in cylinders or cryogenic or high‑pressure contents. So the meaningful takeaway is that the tanker is carrying gasoline. The other options point to materials that would require different vessel designs and placards (cryogenic materials, compressed natural gas in high‑pressure cylinders, or liquefied petroleum gas), which don’t match the 1203 gasoline designation.