Which statement best describes actuators/motors?

• A. Devices for using the power transmitted through the fluid
• B. They create hydraulic pressure
• C. They store energy
• D. They regulate temperature

Answer: (A)

Actuators and motors are devices that convert fluid power into motion or force. In fluid power systems, energy is transmitted through pressurized fluid, and the actuator uses that energy to create linear or rotary movement to perform work, such as extending a hydraulic cylinder or turning a hydraulic motor. They don’t generate the pressure themselves—that’s the role of pumps or compressors—and they aren’t primarily energy storage components (that’s what reservoirs or accumulators do) or temperature regulators (a separate cooling or heating system handles that). So the best description is that actuators and motors are devices that use the power transmitted through the fluid to produce motion.