![fluid dynamics - What happens to the flow rate when a water pump is pumping water through a tube that changes size - Physics Stack Exchange fluid dynamics - What happens to the flow rate when a water pump is pumping water through a tube that changes size - Physics Stack Exchange](https://i.stack.imgur.com/OxHUf.png)
fluid dynamics - What happens to the flow rate when a water pump is pumping water through a tube that changes size - Physics Stack Exchange
Why when we increase the flow rate, the head will decrease, and will the speed of the rotations of the centrifugal pump be constant? - Quora
![Efficiency versus flow rate curves: experimental results and catalogue... | Download Scientific Diagram Efficiency versus flow rate curves: experimental results and catalogue... | Download Scientific Diagram](https://www.researchgate.net/publication/269707128/figure/fig4/AS:294995555831809@1447343829611/Efficiency-versus-flow-rate-curves-experimental-results-and-catalogue-curves.png)