Which hydraulic component is used to convert hydraulic energy into mechanical energy?

The hydraulic cylinder is the correct choice because it specifically converts hydraulic energy, which is the energy contained in a fluid under pressure, into mechanical energy in the form of motion. When hydraulic fluid enters the cylinder at high pressure, it pushes a piston, which creates linear motion. This motion can be used to perform work, such as lifting heavy loads or actuating machinery, thus transforming the energy from the hydraulic fluid into useful mechanical energy.

In contrast, the hydraulic motor is designed to convert hydraulic energy into rotary motion rather than linear motion, making it another effective component but of a different mechanical form. A hydraulic pump's function is to generate hydraulic pressure by moving fluid, rather than converting that energy into mechanical output. Lastly, the hydraulic accumulator stores hydraulic energy for later use but does not directly convert it into mechanical energy; its purpose is more about energy storage and management within the hydraulic system.