What is a requirement for air bags during a pre-trip inspection?

The requirement for air bags during a pre-trip inspection is that they must be mounted securely and not leaking. This is critical for the safety and functionality of the vehicle. Properly inflated and secured air bags ensure that the suspension system operates effectively, providing stability and comfort during operation. A leak in the air bag system can lead to pressure loss, which could compromise vehicle handling and could result in dangerous driving conditions.

The other options do not align with the essential safety and operational criteria for air bags. For example, while having a specific pressure reading is important for other components, it does not apply directly to air bags in the context of the pre-trip inspection. Likewise, the aesthetics of air bags being colorful or decorative is irrelevant to their functional requirements, and while warning lights might be associated with various safety features of the vehicle, they are not a basic requirement specifically for air bags during the pre-trip inspection. Thus, the focus should be on the secure mounting and absence of leaks for the effective functioning of the air bag system.