Which type of tank has a maximum capacity of 4,000-45,000 gallons with visible fittings without a dome?

The correct answer is that a non-pressure tank car is characterized by having a maximum capacity range of 4,000 to 45,000 gallons and typically features visible fittings without a dome. Non-pressure tank cars are designed to transport liquids that do not require high pressure for transport. This capacity range accommodates a variety of bulk liquid products, including hazardous materials, and the lack of a dome makes the fittings and valves on the tank car accessible for loading and unloading operations.

Understanding the design functionality of a non-pressure tank car is crucial, as these cars rely on gravity or pump systems to move the contents and are fitted with safety features to prevent leaks. Other tank types have specific features or operational limits that differentiate them; for example, pressure tank cars are built to withstand higher internal pressures, while MC331 tanks are specifically designed for transporting liquefied gases under pressure. DOT 406 tanks, on the other hand, have unique specifications and are utilized mainly for transporting hazardous materials that do not require pressure. This detailed knowledge helps in identifying the correct type of tank car for transportation needs based on material characteristics and safety regulations.