Which feature indicates that the load capacity has been exceeded on the Aerial ladder?

The load overload visual alarm is a critical feature on an aerial ladder that visually indicates when the load capacity has been exceeded. This system is designed to enhance safety by providing a clear, immediate alert to the operator, allowing them to take action to mitigate the risk of potential failure or accident due to overloading.

When the capacity of the aerial ladder is surpassed, the visual alarm activates, ensuring the crew is aware that they must reduce the weight being carried or consider moving to a safer configuration. This form of alert is important because it helps prevent accidents that could result from exceeding the equipment's designed operational limits.

While a control panel alarm could potentially provide auditory or other alerts, the visual aspect of the load overload alarm specifically emphasizes the status of the ladder’s load capacity. Similarly, both the winch alarm system and the hydraulic pressure gauge serve different functions — particularly related to winching operations or the hydraulic system rather than the overall load capacity of the aerial ladder itself. Thus, the load overload visual alarm is specifically tailored to communicate load capacity issues, making it the correct choice.