You need to select a pump to move a liquid (/r=1500 kg/m³, =90 cp, p_vap=0.05 atm) from a pressurized underground reservoir to a vented above ground tank at a rate of 10 gpm. Which of the four pumps described below do you recommend?

Pump Max. Head (ft) A 35 B 29 24.5 D 14 Max. Capacity Max. Efficiency NPSH Required (gpm) (%) (ft) 16 45 15 20 75 8 8 60 10 12 50 6 40 --A 35 10 ft -B 30 25 *D 6" PVC - 20 ft 1 - ball valve 100 Pump Head (ft) 20 15 10 6" PVC - 110 ft 1 - 90 elbow 1 - ball valve 5 P = 5 atm 0 0 5 20 10 15 Capacity (gpm)