Question 186General Subjects - Assistant Engineer

The correct answer is B) Part "H" will move to block the replenishing pump oil flow across part "G" as flow across hydraulic motor decreases. This is correct because in a variable displacement pump, the discharge flow rate is controlled by the angle of the tilting box. As the high-side pressure increases, part "H" will move to restrict the replenishing pump oil flow across part "G", which in turn reduces the flow across the hydraulic motor, causing the discharge flow rate to decrease. The other options are incorrect because they do not accurately describe the mechanism by which the discharge flow rate is reduced in a variable displacement pump with the illustrated device. Options A, C, and D do not correctly explain how the components of the device work together to control the discharge flow rate.