A rail car with exposed fittings would be considered to be a _______ car.

• A. Non-pressure or low-pressure tank
• B. Pressure tank
• C. Cryogenic liquid tank
• D. Dedicated car

Answer: (A)

Exposed fittings on a tank car point to it being a non‑pressure or low‑pressure design. These cars carry liquids at near-ambient pressure, and their valves and connections are not protected by heavy housings. Pressure tank cars, by contrast, have fittings that are protected because they operate at higher pressures, and cryogenic cars have specialized insulation and fittings for very low temperatures. The term “dedicated car” refers to usage, not construction, so it doesn’t explain the visible fittings. So, a rail car with exposed fittings is best described as a non‑pressure or low‑pressure tank car.