Question 3 (10 marks) A centrifugal pump is required to produce a flow of water at a rate of 0.0160 m3/s against a total head of 30.5m. The operating characteristics of a pump at a speed of 1430 rev/min and a rotor diameter of 125mm is as follows. Efficiency o 48 66 66 45 Qa (m3/s) 0 0.0148 0.0295 0.0441 0.059 Ha (m) 68.6 72 68.6 53.4 22.8 Determine the correct size of a pump and its speed to produce the required head and flow. A pump draws water from a tank and delivers it to another with the surface 8m above that of the lower tank. The delivery pipe is 30m long, 100mm bore diameter and has a friction coefficient of 0,0