What is a risk associated with improper bonding of metallic structures?

Improper bonding of metallic structures poses a significant risk, primarily due to the potential for increased electrical shock or equipment damage. Proper bonding ensures that electrical conductive materials are at the same electrical potential, preventing dangerous voltage differences. When structures are improperly bonded, they can become energized, which significantly raises the likelihood of a person coming into contact with a live surface, leading to the risk of electrical shock. Additionally, the lack of proper bonding can result in faults within the electrical system that may cause damage to sensitive equipment and systems connected to the infrastructure.

While the other options discuss negative consequences related to electrical systems, they do not specifically address the critical safety implications that arise from improper bonding. For instance, efficiency loss or energy loss may occur due to poor connections, but these are secondary concerns compared to the immediate hazards of shock and damage to people and equipment. Therefore, the primary focus on safety clearly indicates that the most pressing risk associated with improper bonding is indeed the increased risk of electrical shock or equipment damage.