A two-stage variable-displacement oil pump is being described. Technician A says that the space between the pump vanes is increased or decreased to change pump output volume. Technician B says that a hydraulic control valve rotates the ring against spring pressure to vary the space swept by the pump vanes. Who is right?
A)A only"
B)B only"
C)Both A and B
D)Neither A nor B"

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. Technician A is right in saying that the space between the pump vanes is adjusted to change the output volume. Technician B is also correct in stating that a hydraulic control valve can rotate the ring against spring pressure to vary the space swept by the pump vanes, thus controlling the pump's output.

A Two-Stage Variable-Displacement Oil Pump Is Being Described