Cylinder and cryogenic liquid container outlet connections shall be designed so that the attachment point becomes ________ when removal of the outlet connection is attempted.

• A. unusable
• B. reusable
• C. universal
• D. unsuitable

Answer: (B)

The design question tests how the outlet interface behaves during disassembly to keep gas systems safe and maintainable. The attachment point is intended to be reusable after an outlet connection removal. This means that when you disconnect, the components stay in a condition that can be safely reattached later without damage, leakage, or the need for replacing the whole interface.

Why this is the best fit: in gas and cryogenic systems, connections are routinely connected and disconnected for maintenance, reconfiguration, or safety checks. A reusable interface ensures that the connection can be renewed safely and repeatedly without compromising the seal, alignment, or integrity of the coupling. It supports reliable reattachment to the proper counterpart and minimizes downtime and the risk of introducing faults through forced or damaged connections.

Why the other ideas aren’t as appropriate: a design that becomes unusable after disconnection would create unnecessary risk and downtime, because it could require component replacement or could hint at a damaged or degraded interface. Universal or unsuitable descriptors don’t capture the safety and maintenance intent of the standard, which is to preserve a safe, repeatable, and serviceable connection.