What basic hydrant design is used in Greensboro due to the climate?

What basic hydrant design is used in Greensboro due to the climate?

• A. Wet barrel hydrant
• B. Wet-dry hydrant
• C. Dry barrel hydrant
• D. Flush hydrant

Answer: (C)

The concept here is choosing hydrant design to prevent freezing in cold weather. In climates with freezing winters, the valve is kept underground so the portion of the hydrant exposed above ground stays dry. A dry barrel hydrant has its valve in a buried chamber; the upright part above ground remains dry until you open it, at which point water moves up from the underground supply. This setup prevents water inside the hydrant from freezing and causing damage. Wet barrel hydrants, by contrast, are filled with water in their barrel at all times and are not as suitable for freezing conditions, which is why dry barrel hydrants are used in Greensboro.

The concept here is choosing hydrant design to prevent freezing in cold weather. In climates with freezing winters, the valve is kept underground so the portion of the hydrant exposed above ground stays dry. A dry barrel hydrant has its valve in a buried chamber; the upright part above ground remains dry until you open it, at which point water moves up from the underground supply. This setup prevents water inside the hydrant from freezing and causing damage. Wet barrel hydrants, by contrast, are filled with water in their barrel at all times and are not as suitable for freezing conditions, which is why dry barrel hydrants are used in Greensboro.