Inpeller diameter To in 35 53 3X 4-10 1750 RPM 110 61 165 71 30 100 73.739 373 -72 x 0 % 21 69 25 NO 2018 in 20 10 HP Tin 63 50 75 HP 15 4015 10 30 20 SHP 151 15 HP 3 HP HP 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 25 50 9 in 10 in 10 0 10.0 7.5 5.0 25 0 0 718 6 in Impeller 35 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 Capacity (gal/min) 1200 1600 600 400 0 200 NOO JO 1400 Capacity (L/min FIGURE 13.30 Performance for a 3 X 4 - 10 centrifugal pump at 1750 rpm. (Source: Reprinted by permission of ITT Corporation.) . The figure shows the composite pump performance chart for 3X4 - 10 centrifugal pump at 1750 rpm. 1. State the highest efficiency for the 9" impeller and the corresponding head in ft and flow rate in gallons/minute for the highest value of Q. 2. Determine the power in hp required to run the pump. Keeping the original 9" impeller, the pump driver is changed to a variable speed drive (VSD) motor with minimum and maximum speed of 1500 RPM and 3000 RPM respectively. The pump has to operate at a flowrate of 325 gallons/minute. III. Compute the RPM at which the pump can deliver 325 gallons/minute for an impeller size of 9 inches. IV. Give the corresponding head in ft to 1d.p and the power in hp to 1d.p of the pump