Question 190General Subjects - Assistant Engineer

The correct answer is D. When the directional control valve is centered, the oil pressure will equalize at both ends of the actuator, but a difference in pressure may exist between the rod and cap end due to the load on the actuator. The pump will continue to discharge oil, with the excess flow being directed across the relief valve to the sump. The other options are incorrect because: A) The pressure will not be equal on both sides of the actuator when the load is unbalanced. B) The pressure differential will not be across the unloading valve, but rather the actuator itself. C) The reducing valve will not be involved in this scenario, as the pump will continue to operate and discharge to the relief valve.