Advantage: Start up under heavy load.

• A. Precise positioning
• B. Start up under heavy load
• C. Flow control independent of load
• D. Good control and regulation

Answer: (B)

The main idea is that hydraulic systems can deliver high starting force, so they can initiate movement even when the load is heavy. A hydraulic actuator produces force by the pressure in the fluid times the piston area (F = P × A). The pump and valves can raise the pressure quickly to overcome the resisting load, friction, and inertia at the moment of start, even when velocity is near zero. This startup capability under heavy resistance is a clear practical advantage in applications like clamps, presses, or lifting operations where loads can be substantial right from the moment motion begins.

While precise positioning, flow control that’s completely independent of load, and overall good control are important traits, they don’t capture the specific edge of being able to start moving under a heavy load. Flow control that’s truly independent of load isn’t typical in basic systems without specialized valves, and precise positioning or general regulation describe other aspects of performance rather than the ability to overcome heavy initial resistance.