The volume of water passing a point at a particular moment is called?

• A. Flow rate
• B. Total flow
• C. Volume
• D. Discharge

Answer: (A)

Flow rate describes how much water passes a cross-section per unit time. It captures the instantaneous amount moving past that point, i.e., the rate at which water is flowing, rather than the total volume present. If you want the actual water volume that passes over a period, you’d multiply the flow rate by the time interval to get volume. Discharge is another commonly used term for the same concept in hydraulics, but the scenario described emphasizes the rate at which water passes a point, making flow rate the best fit. Volume would be the amount of water itself, not the passing rate, and total flow isn’t a standard term.