Which of the following rail cars would be classified as non-pressurized?

Which of the following rail cars would be classified as non-pressurized?

• A. Tank car
• B. Box car
• C. Non-pressurized rail car
• D. Flat car

Answer: (C)

Non-pressurized design is about whether a car is built to contain internal pressure. A non-pressurized rail car is explicitly defined by not being able to withstand or contain internal pressure, so it won’t have pressure-relief features and isn’t used for pressurized contents. Among the options, the one that literally states this designation—non-pressurized rail car—is the best fit. The other car types describe shape or typical use (tank, box, flat) and can carry various kinds of cargo, but they don’t specify a pressure-design category by themselves, so they aren’t defined as non-pressurized the way the explicit label is.

Non-pressurized design is about whether a car is built to contain internal pressure. A non-pressurized rail car is explicitly defined by not being able to withstand or contain internal pressure, so it won’t have pressure-relief features and isn’t used for pressurized contents. Among the options, the one that literally states this designation—non-pressurized rail car—is the best fit. The other car types describe shape or typical use (tank, box, flat) and can carry various kinds of cargo, but they don’t specify a pressure-design category by themselves, so they aren’t defined as non-pressurized the way the explicit label is.