A flat blade turbine having six blades is centrally installed in a vertical tank. The tank is 6 ft (1.83 m) in diameter; the turbine is 2 ft. (0.61 m) in diameter and is positioned 2 ft (0.61 m) from the bottom of the tank. The turbine blades are 5 in. (127 mm) wide. The tank is filled to a depth of 6 ft (1.83 m) with a solution of 50 percent caustic soda, at 150 F (65.6 C), which has a viscosity of 12 cP and a density of 93.5 lb/ft3 (1498 kg/m3). The turbine is operated at 90 r/min. the tank is baffled. What power will be required to operate the mixer? (Given KL=403680).

A flat blade turbine having six blades is centrally installed in a ver

1.	A flat blade turbine having six blades is centrally installed in a vertical tank. The tank is 6 ft (1.83 m) in diameter; the turbine is 2 ft. (0.61 m) in diameter and is positioned 2 ft (0.61 m) from the bottom of the tank. The turbine blades are 5 in. (127 mm) wide. The tank is filled to a depth of 6 ft (1.83 m) with a solution of 50 percent caustic soda, at 150 F (65.6 C), which has a viscosity of 12 cP and a density of 93.5 lb/ft³ (1498 kg/m³). The turbine is operated at 90 r/min. the tank is baffled. What power will be required to operate the mixer? (Given K_L=403680).
A.	2.47 kW
B.	6.05 kW
C.	3.21 kW
D.	4.00 kW
Answer» B. 6.05 kW