What test determines the available water supply at a specific location by measuring flow and pressure from hydrants?

The correct answer is the Flow Test, as it specifically measures the available water supply at a given location by determining both the flow rate and the pressure from fire hydrants. This test is crucial for assessing whether the water supply meets the demands of firefighting operations.

During a Flow Test, firefighters or inspectors open a hydrant and measure how much water flows out over a set period, along with the pressure at that time. This data is essential for understanding the capability of the water supply system to deliver adequate water for fire protection purposes.

Flushing Tests are generally conducted to clear debris from pipelines and ensure the hydrants are functioning properly, but they do not focus on measuring the available flow and pressure in relation to firefighting requirements. Hydrostatic Tests are used to check the integrity of piping systems by pressurizing them to see if they can hold water without leaking, while Hydraulic Calculations involve the theoretical assessment of water flow and pressure in a system, but they do not provide real-time data from actual hydrants.