A rail car with exposed fittings is which type of tank?

A rail car with exposed fittings is which type of tank?

• A. Pressure or high-pressure tank
• B. Hopper
• C. Cryogenic liquid tank
• D. Non-pressure or low-pressure tank

Answer: (D)

Exposed fittings on a rail car point to a non-pressure or low-pressure design. These tanks are not built to hold significant internal pressure, so their loading and unloading fittings are mounted on the outside for easy access and routine venting when needed. In contrast, tanks designed for higher pressures use protective housings and special fittings to contain the pressure and prevent leaks, and cryogenic tanks are heavily insulated with fittings integrated into that system. A hopper is for bulk solids, not liquids. So the car with visible, exterior fittings fits the non‑pressure or low‑pressure category.

Exposed fittings on a rail car point to a non-pressure or low-pressure design. These tanks are not built to hold significant internal pressure, so their loading and unloading fittings are mounted on the outside for easy access and routine venting when needed. In contrast, tanks designed for higher pressures use protective housings and special fittings to contain the pressure and prevent leaks, and cryogenic tanks are heavily insulated with fittings integrated into that system. A hopper is for bulk solids, not liquids. So the car with visible, exterior fittings fits the non‑pressure or low‑pressure category.