Which term describes the method of sealing a vault using the air pressure created by placing the dome onto the base?

• A. Air Seal
• B. Air Tray
• C. Alternative Container
• D. Drawer

Answer: (A)

The method being tested is about sealing by using the pressure of the air formed when the dome is placed onto the base. When the dome comes down and seats against the base, the air between them is compressed, creating an airtight joint around the rim. That air-pressure-driven closure is what defines an air seal. It’s different from simply using a tray, a drawer, or an alternate container, each of which refers to other components or concepts rather than the act of sealing through compressed air.