In a fluid-powered system, which device transforms fluid power into motion?

• A. Actuator
• B. Sensor
• C. Pump
• D. Valve

Answer: (A)

Actuator is the device that converts fluid power into motion in a fluid-powered system. When pressurized fluid acts on an actuator, its mechanism transforms that energy into mechanical movement, producing linear motion in cylinders or rotational motion in motors. The pump provides the energy by creating pressure and flow, but it doesn’t move the load itself. Valves control and direct the flow, modulating speed and direction, while sensors measure or feedback position and pressure. So, the component that actually turns fluid power into motion is the actuator.