How does a hydraulic system benefit from a constant-displacement pump?

A hydraulic system benefits from a constant-displacement pump primarily because it maintains a steady fluid delivery. This type of pump moves a fixed volume of fluid with each stroke or rotation, which ensures consistent flow and pressure under normal operating conditions. The predictability of fluid delivery is crucial in hydraulic systems as it allows for more precise control over the movement and force applied in various hydraulic applications, such as in hydraulic actuators or lifts.

Unlike variable-displacement pumps, which can alter the flow based on the system's requirements, constant-displacement pumps deliver the same amount of fluid regardless of the system pressure. This feature is especially important in applications where a uniform speed or force is necessary, enhancing overall system stability and performance. Additionally, having a constant flow rate simplifies system design and can improve efficiency in delivering power to hydraulic actuators, making it easier to control the motion of machinery and equipment.

The other options do not accurately reflect the primary benefit of a constant-displacement pump. For instance, providing varying pressure outputs refers to the operation of a variable-displacement pump, and facilitating fluid expansion is not a relevant characteristic of this type of pump. Similarly, while the size of the pump may vary, a constant-displacement pump is not inherently designed to reduce the overall size