TPC Basic Hydraulics Complete Practice Test 2025

In an axial-piston motor, the speed is primarily influenced by the flow of the fluid. This is because the motor operates by the hydraulic fluid entering and exiting the chambers of the motor, which directly affects how fast the pistons can move in a rotational manner.

As the flow rate increases, more fluid enters the system within a given period, causing the pistons to cycle more rapidly. Consequently, this leads to an increase in the speed of the motor. The relationship between flow and speed is fundamental in hydraulic systems—more flow means quicker actuation of the components involved.

While pressure can also affect performance, it primarily influences the torque output rather than the speed. Similarly, temperature and density play roles in fluid characteristics and overall system efficiency but are not direct variables impacting the operational speed of axial-piston motors in the same way that flow does.