Which of the following substances can an MC-331 pressure cargo tanker carry?

An MC-331 pressure cargo tanker is specifically designed for transporting certain types of compressed gases and liquefied gases under pressure. This design allows the tanker to safely carry chemicals like ammonia and propane, which are both commonly transported in a gaseous state but can also exist in liquid form when pressurized.

Ammonia, often found in industrial applications and agriculture, and propane, used as a fuel, both require the structural integrity and pressure handling capabilities of the MC-331 tanker. These substances are classified as gases that can be stored and transported under pressure, which aligns perfectly with the features of the MC-331 design.

Other substances mentioned, such as concentrated sulfuric acid, powders, and food-grade liquids, are typically not suitable for transport in an MC-331 pressure cargo tanker. Sulfuric acid is generally carried in tankers designed for corrosive materials, while powders and granular materials usually require different types of containers, such as hopper trailers. Food-grade liquids would generally be transported in tankers that ensure the material's cleanliness and compliance with food safety regulations, which would not be met by an MC-331 tanker designed for pressurized gases.