Question 288General Subjects - QMED

The correct answer is C) changing the speed of the pump. The output volume of a positive fixed displacement pump can only be changed by varying the speed of the pump. This is because a fixed displacement pump has a constant volumetric displacement per revolution, so the only way to change the output volume is to change the pump's rotational speed. Changing the angle of the tilting plate (A), moving the shaft trunnion block (B), or moving the slide block and rotor (D) are not ways to adjust the output volume of a positive fixed displacement pump, as these methods are used for variable displacement pumps, not fixed displacement pumps.