What is one method used for changing the output of a pump?

Adjusting drive speed is an effective method for changing the output of a pump. By increasing the speed at which the pump operates, the flow rate typically increases, leading to a higher output. Conversely, reducing the drive speed can also lower the output. This method allows for precise control over the performance of the pump, making it adaptable to varying system requirements.

Changing the oil type does not directly affect the pump output, although it may influence efficiency or operational characteristics. Altering the pump's diameter can change output, but it usually involves more significant modification to the pump itself rather than simple adjustments. Increasing the temperature could affect viscosity and other properties of the fluid but doesn’t provide a direct or predictable means for adjusting the output flow rate of the pump.