2)a

For problems 2a and 2b, determine the total power input required assuming 80% efficiency. 106 kW O 212 kW O 265 kW O none of the aboveFor problemss 2a-2c, calculate the rotaional speed of the impellar. O 0.39 rev/s O 0.56 rev/s O 0.74 rev/s O none of the aboveYou have been assigned the job of designing rapid-mix (coagulation) tanks for the town of Freemont. Determine the tank length and width Design parameters for the rapid-mix Detention time = 2 mins No. of tanks: 2 Velocity gradient (G) = 750 /s Impeller type: radial, with Np = 3.6 Impeller diameters available = 0.25, 0.5 and 1.0 m Tank length = width B = Hwater/3 Q =0.17 m^3/s H = 1.85 x 10-5 Pa-s O 2.71 m 3.05 m 2.16 m O none of the aboveFor problem 2a, assuming that length = width = 2 m, determine an appropriate impellar diameter. 0.25 m 0.5 m 1.0 m O none of the above