To prevent container damage, shields must be installed to avoid which of the following?

The correct response emphasizes the importance of preventing direct contact between the shield and the container to avoid potential damage. When a shield directly contacts the container, it can cause abrasions, dents, or other forms of physical damage, which may compromise the integrity of the container. This is especially critical in the context of compressed natural gas delivery, where the safety and reliability of the containment are paramount.

Understanding why maintaining a barrier is essential helps ensure that the container remains structurally sound and continues to function effectively without leaks or failures. Properly positioned shields can protect the container from external impacts while also allowing for ventilation and thermal expansion, which further contributes to the container's longevity and safety.