The diameters of the suction and delivery pipes are 15 cm. The motor is supplied at 460 volt, 3 phase and has a power factor of 0.875 and has a constant efficiency of 90%. A) Calculate by hand the net head delivered and the efficiency of the pump at flow rate of 63 L/s. B) Use excel sheet and its formula to solve the equations and plot the pump head, power input, and efficiency versus the pump flow rate.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.