Problem 1 A centrifugal pump takes brine, whose specific gravity is 1.18 and the viscosity is 1.2 cP, from the bottom of a supply tank and delivers it into the bottom of another tank. The brine level in the discharge tank is 150 ft above that in the supply tank. The line between the tanks is 600 ft of 4-in. Schedule 40 pipe. The flow rate is 400 gal/min. In the line are two gate valves, four standard tees, and four ells. What is the total energy for running this pump for 24-h? The overall efficiency of pump and motor is 60 percent. (Note: Contraction and expansion when the fluid enters or comes out from the pipe should also be considered.) Problem 2 It is proposed to pump 10,000 kg/h of toluene at 114C and 1.1 atm abs pressure from the reboiler of a distillation tower to a second distillation unit without cooling the toluene before it enters the pump. If the friction loss in the line between the reboiler and pump is 7 kN/m and the density of toluene is 866 kg/m, how far above the pump must the liquid level in the reboiler be maintained to give a net positive suction head of 2.5 m? Problem 3 A horizontal venturi meter having a throat diameter of 20 mm is set in a 75-mm-ID pipeline. Water at 15C is flowing through the line. A manometer containing mercury under water measures the pressure differential over the instrument. When the manometer reading is 500 mm, what is the flow rate in m/h? If 12 percent of the differential is permanently lost, what is the power consumption of the meter