2 for the system shown in Figure 2, the parameters of pump and motor are as follows: maximal displacement of pump V, pmаx 115ML/r , speed of pump Nmp 1000r/min, mechanical efficiency of pump = 0.9, total efficiency of pump = 0.84; displacement of motor V 148mL/r, mechanical efficiency of motor Nmm m = =0.9, total efficiency of motor "m = 0.84, the permitted maximum pressure in pipe || Pr = 8.3Mpa, if the pressure losses in pipeline is not considered, calculate: 1) Maximal speed of motor, and the output power and output torque at this speed 2) the input driving torque of pump Figure 2

The figure shown below is a series pipeline system used to draw a fluid from a lower source open tank to a higher destination open tank . The flow and geometric layout for the system are listed below: Fluid: water       Volume flow rate: Q=0.015 m3/s Elevation difference:  h=8.0m of two free surfaces Suction line:                      DN100 Sch. 40 Steel pipe                      Length: Ls=2.0 m                      Valve1: hinged disc type foot valve                      Entrance type: well-rounded Discharge line:                           DN80 Sch. 40 Steel pipe                           Length: Ld=100 m                           Valve2: full open gate valve                           Elbows:  90ο long radius elbow   (1)  Select the simplified general energy equations for section 1 and 2_________       A.     B.     C.     D.

show all working out please

A scale model of a pump has been tested and the following results obtained. Impeller diameter (D)           110mm Power input (P)                   2.5kW  Speed (N)                           1500 r.p.m. Flow (Q)                              14.5 litres/sec Head (H)                             17m Efficiency (E)                      60%   You are to determine the speed and size of a geometrically similar pump which would deliver a flow rate of 25 litres/sec against a 22m resistance head. Determine the power input required by this pump.