Question: The drain line on a hydraulic pump was allowed to drain into a container. (The drain line provides a pathway for fluid that leaks into the housing to flow back to the reservoir.) The container was weighed every two minutes, and these measurements used to calculate the leakage flow rate. Pressure drop across the pump was measured to obtain the data given in Table. Pump displacement is 3.15 in3/rev, and it is operated at nominal speed of 2925 rpm. Measured pump speed at each loading (each pressure reading) is given in Table 4.4. Note that the pump speed slows as the load on the prime mover increases.
Deduce the volumetric efficiency from the data in Table and present these data in tabular and graph form.