Which storage type is described as non-pressure atmospheric storage tanks?

• A. Non-pressure atmospheric storage tanks
• B. Low pressure storage tanks
• C. Cryogenic liquid tanks
• D. Dewar flask

Answer: (A)

Non-pressure atmospheric storage tanks are built to hold liquids at ambient pressure without any internal pressurization. They vent vapors to the surrounding air, and the vapor space above the liquid is open to atmosphere rather than sealed to maintain pressure. This describes storage designed for liquids that don’t generate significant vapor pressure and don’t require pressurization.

That’s why this option fits best: it explicitly identifies the tank type as non-pressurized and atmospheric. The other choices describe different systems: low-pressure storage tanks maintain a small amount of internal pressure, cryogenic liquid tanks handle very low temperatures, and a Dewar flask is a portable, vacuum-insulated container used for cryogenic storage.