there is some confusion in problem 2between the image and the text so
Question
A pump is located 4.5 m to one side of and 3.5above a reservoir. The pump is designed for a flow rate of 6 L/s. For satisfactory operation,the static pressure at the pump inlet must not be lower than -6m of water gauge.Determine the smallest standard commercial steel pipe that will give the required performance.Hint: you will need to use a trial and error method
There is some confusion in problem 2between the image and the text. So:- Use either 6 of 6.5m/s. It would not make a significant difference.- Use 4 m, (not 4mm) there is certainly an error in the figure