Fluid power deals with the transmission and control of energy by a pressurized_____.

• A. Vessel
• B. Directional Control Valve (DCV)
• C. Electric Motor
• D. Fluid

Answer: (D)

Fluid power relies on a pressurized fluid to carry and control energy. The fluid under pressure acts as the energy carrier, transmitting power from the pump to actuators and allowing control through devices like valves. The vessel is just the container holding the fluid, not the energy transfer medium. A directional control valve shapes and directs flow but doesn’t itself provide the energy—it's the pressurized fluid that does the work. An electric motor, by contrast, converts electrical energy to motion, not fluid energy. So the correct idea is that energy is transmitted and controlled by a pressurized fluid.