4.31 An inline pump is being used to transport water from a large tank. The water is at a temperature of 20°C and is being delivered at a rate of 45 L/s. The suction line is 6-nom sch 40 commercial steel pipe that is 40 m long. The NPSH required by the pump is 3.2 m. Atmospheric pressure is 1 bar.

a. Determine the maximum height above the water surface that the pump can be installed to prevent cavitation.

b. Investigate the effect of the water temperature by plotting the maximum pump height as a function of the water temperature for 10°C ≤ T ≤ 80°C.