What is the formula to calculate the flow rate of a pump when RPM is increased?

The formula for calculating the flow rate of a pump when RPM is increased relies on the direct relationship between flow rate and the speed of the pump, measured in revolutions per minute (RPM). When you increase the RPM of a pump, the flow rate will also increase proportionally, assuming that other conditions remain constant, such as the size of the pump and the viscosity of the fluid being pumped.

The correct formula states that the new flow rate can be computed by taking the current flow rate in gallons per minute (gpm) and multiplying it by the ratio of the new RPM to the current RPM. This relationship is based on the principle that when you increase the speed of the pump, you effectively move more fluid in the same amount of time, hence increasing the flow rate.

Other options provided do not establish this direct proportional relationship correctly. Some may represent confusion about flow rate calculations, head pressure, or efficiency, which are not relevant in this particular context of RPM influence on flow rate. This framework is crucial for operators to understand, as it directly affects the design and operation of pumping systems in wastewater management.