Bloom into Success: Ace the 2025 Irrigation Exam 2 Practice and Grow Your Green Thumb!

The assertion that an increase in the velocity of a fluid reduces the discharge pressure of a pump and that it requires less horsepower is indeed false.

In a pumping system, when the velocity of the fluid increases, it is often associated with an increase in dynamic pressure, which can contribute to higher discharge pressure rather than a reduction. The energy required to move the fluid also typically rises with increased velocity because the pump must work harder to overcome the additional friction losses and changes in pressure that come with faster flow.

Furthermore, the relationship between horsepower and velocity is not straightforward. Higher fluid velocities can lead to increased energy losses due to turbulence and friction in pipes, which can actually necessitate more horsepower to maintain the desired flow rate. Thus, stating that increased velocity requires less horsepower does not accurately reflect the operational dynamics of most pumping systems.

Understanding these principles helps clarify the relationship between fluid velocity, discharge pressure, and power requirements in various pumping contexts.