What is a characteristic of pressure tank cars?

Top mounted fittings that are protected is a correct characteristic of pressure tank cars. These tank cars are designed to transport hazardous materials under pressure, and the fittings located at the top are engineered with safety features to minimize the risk of leaks or spills during transport. Protective covers or guardrails are often implemented to shield these fittings from potential damage during loading, unloading, or handling.

This design consideration is crucial for maintaining the integrity of the tank and preventing hazardous material release, addressing safety standards that govern the transport of dangerous goods. The presence of well-designed top-mounted fittings with protective features helps to ensure that pressure tank cars are safer for both the environment and responders should an incident occur.

Other characteristics, such as the absence of pressure limits or having no protection for internal valves, do not accurately represent the defined safety features inherent in pressure tank cars. Furthermore, merely having visible piping lacks the necessary context to describe the specific safety measures and operational design intended for safe transportation.