Final answer:
To determine if a dry-barrel hydrant is still draining, you can observe the flow of water, measure the pressure inside with a gauge, or check the water level using an indicator.
Step-by-step explanation:
To determine if a dry-barrel hydrant is still draining, you can observe the flow of water. A dry-barrel hydrant is designed to drain water from the barrel when it is not in use, preventing freezing in cold climates. If the hydrant is still draining, you will see a continuous flow of water from the drainage holes or valve at the bottom of the barrel.
Additionally, you can use a pressure gauge to measure the pressure inside the hydrant. If the pressure is decreasing over time, it indicates that the hydrant is still draining. This can be done by attaching the pressure gauge to the hydrant's outlet and monitoring the pressure readings.
Another method is to use a water level indicator. By checking the water level in the hydrant barrel at regular intervals, you can determine if it is still draining. If the water level continues to decrease, it means the hydrant is still draining.