Which tank car has multiple fittings on the top?

• A. Non-pressure
• B. Pressure
• C. Cryogenic Liquid
• D. Gasoline Tank

Answer: (A)

Non-pressure tank cars are designed to carry liquids without internal pressure, so they use several fittings on the top to handle loading, unloading, venting, and sampling. This arrangement—multiple top fittings—is a practical feature of non-pressurized cars, reflecting their operational needs for venting and connections during transfers. In contrast, pressure cars are built to contain pressurized contents and have fittings and safety devices arranged for that purpose, while cryogenic cars use insulation and specialized cold-service fittings. Gasoline tank cars are usually non-pressure as well, but the distinguishing trait here is the presence of multiple top fittings that support non-pressurized operation.