What component moves a volume of liquid from a low pressure to a high pressure?

• A. A component that dissipates energy.
• B. A component that moves a volume of a liquid from a low pressure to a high pressure.
• C. The natural frequency of a structure.
• D. The turning effect of a force about a pivot.

Answer: (B)

Moving liquid from a low pressure to a high pressure requires adding energy to the fluid. A pump does this by converting mechanical energy into hydraulic energy, pushing the liquid against the pressure gradient and raising its pressure. This energy transfer is exactly what drives flow to higher pressure areas in a hydraulic system. The other ideas don’t accomplish this: dissipating energy tends to reduce pressure or waste energy, resonance relates to vibration, and torque is about rotational effect—not increasing fluid pressure. So the component that moves a volume of liquid from low pressure to high pressure is the pump.