Which units are commonly used for flow measurement in various industries?

Gallons per minute (GPM) and liters per second (L/s) are widely recognized and utilized units for measuring flow rates in various industries, particularly in water and wastewater management, irrigation, and other fluid-related processes. GPM is commonly employed in the United States for quantifying the flow of liquids in plumbing and supply systems, while L/s is more prevalent in scientific and engineering applications, especially in metrics-based systems.

These units effectively convey the volume of fluid that passes through a point in a given time frame, which is crucial for ensuring optimal system performance, meeting safety regulations, and design criteria in engineering projects. Flow measurement is vital for monitoring processes, maintaining quality control, and performing system diagnostics across numerous sectors. The other options represent measurements of pressure or velocity rather than volumetric flow rates, making them unsuitable for this question's context focused on flow measurement.