How is the proper water level maintained in the hot well?

The proper maintenance of the water level in the hot well is crucial for the efficient operation of systems that utilize water cooling, such as in marine engines or industrial chillers. The preferred method, indicated by the correct choice, involves using an overboard and recycling valve. This system automatically regulates the water level by allowing excess water to be released overboard while simultaneously recycling the water back into the hot well as needed.

This method is advantageous because it ensures a consistent water level without manual intervention, minimizes the risk of overflow, and maintains optimal cooling efficiency. The automated nature of this system allows for reliable operation, reducing the possibility of human error that can occur with manual adjustments. In contrast, simply adding coolant, draining excess water, or making manual adjustments do not provide a continuous or efficient means for keeping the water level stable in response to varying operational conditions.