How is hydraulic oil defined?

Hydraulic oil is specifically designed as a fluid that transmits power within hydraulic systems. It functions by translating the force exerted by a pump into energy that can move actuators, valves, and other components of the system. The properties of hydraulic oil, such as its incompressibility and ability to flow freely under pressure, make it suitable for this purpose.

While options referring to cooling, reducing friction, or lubrication of moving parts are functions relevant in other contexts, they do not accurately capture the primary role of hydraulic oil. Hydraulic systems are distinct in that their primary purpose revolves around power transfer, differentiating them from applications solely focused on lubrication or friction reduction.