Which statement is correct regarding wet-barrel hydrants?

The statement regarding wet-barrel hydrants being correct is that the barrel has separate valves for each outlet. This design allows for individual control of each outlet, which is crucial for managing water flow effectively during emergencies. In wet-barrel hydrants, each outlet can be opened or closed independently, allowing firefighters to use multiple hoses without affecting the water supply to other lines. This feature is particularly beneficial in urban settings where multiple operations may need to be conducted simultaneously.

In contrast, the incorrect choices highlight different characteristics. A wet-barrel hydrant with one valve controlling all outlets would limit versatility and effectiveness during multiple simultaneous operations. The assertion that wet-barrel hydrants are only used in cold climates is incorrect, as they are commonly used in regions where freezing temperatures are not a significant concern, unlike dry-barrel hydrants, which are designed for cold climates. Lastly, the notion that all water stays in the barrel even when closed does not reflect the proper operation of a wet-barrel hydrant, as water remains in the barrel only when the hydrant is functioning, and the valves are designed to manage water flow as needed.