A __________ cargo tank has an inner tank with an outer shell, and is well insulated.

A __________ cargo tank has an inner tank with an outer shell, and is well insulated.

• A. Cryogenic
• B. Non-cryogenic
• C. Pressurized
• D. Ambient

Answer: (A)

The question is testing knowledge of cryogenic cargo tank design. Cryogenic tanks are built with a double-wall structure: an inner tank that actually holds the extremely cold liquid, and an outer shell with a space between them that is highly insulated. That insulation (often a vacuum or multilayer insulation) minimizes heat transfer from the surroundings, keeping the contents at very low temperatures and reducing boil-off. This kind of well-insulated, double-walled construction is characteristic of cryogenic equipment used for liquefied gases like LNG, oxygen, or nitrogen. Other types—non-cryogenic or ambient—don’t rely on this inner-outer, highly insulated arrangement for maintaining such low temps, and while some pressurized tanks may have insulation, the defining feature described aligns with cryogenic design.

The question is testing knowledge of cryogenic cargo tank design. Cryogenic tanks are built with a double-wall structure: an inner tank that actually holds the extremely cold liquid, and an outer shell with a space between them that is highly insulated. That insulation (often a vacuum or multilayer insulation) minimizes heat transfer from the surroundings, keeping the contents at very low temperatures and reducing boil-off. This kind of well-insulated, double-walled construction is characteristic of cryogenic equipment used for liquefied gases like LNG, oxygen, or nitrogen. Other types—non-cryogenic or ambient—don’t rely on this inner-outer, highly insulated arrangement for maintaining such low temps, and while some pressurized tanks may have insulation, the defining feature described aligns with cryogenic design.