Problem: A pump draws water through a 300-mm diameter cast iron pipe, 15 m long from a reservoir in which the water surface is 4.5 m higher than the pump and discharges through a 250-mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m higher than the pump. Considering f = 0.02 and the coefficients for minor head losses (kentrance = 0.5, kpend = 0.35, and kexit = 0.5), compute the following: a. Pressure head at the suction side of the pump b. Pressure head at the discharge side of the pump c. Horsepower output of the pump Note: generally, total minor head losses =E h,m, ; hm, = kentrance hm, = kpend hm, = kexit Elev.B T

Problem modified from Example 5.8. The 20-cm-diameter (= d) tank of Figure 5.15 shown in the textbook contains chloroform, and it is being drained by the attached piping system. The pipe Section itself is made of 3-nominal schedule 40 commercial steel and it is 25 m long. Considering minor losses (90° elbow, regular), determine the variation of velocity and height with time if the height h is allowed to vary from an initial value of 2 m to 1.2 m. Assuming that the constant friction factor formulation can be applied. h d - D FIGURE 5.15. The unsteady draining tank problem.

0105 Water at 40 °C is pumped from an open tank through 200 m of 50-mm-diameter smooth horizontal pipe as shown in Figure 1 and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. (a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? (b) What is the NPSHA at the pump inlet? Neglect losses in the short section of pipe connecting the pump to the tank. Assume standard atmospheric pressure. Note: for smooth pipe, friction factor, f = 0.0152 and at 40 °C. kinematic viscosity Temperature (°C) Water vapor pressure (N/m²) Specific weight (N/m³) (m²/s) 6.58 x 10-7 40 7.376 x 10³ 9.731 x 10³ T 3 m ! PUMP 9.731* Diameter = 50 mm Length 200 m e Figure 1

I need help on this question: According to the question: a) If the pipe connected to the pump inlet has a diameter of 24 mm with length (LCP) of 5 m and Darcy friction factor of 0.03, what would be the actual head rise across the pump for a case where the pump outlet pressure is 200 kPa? The difference in height between pump inlet and outlet is 0.25 m, the tank exit is sharp-edged, and the water level in the tank to the tank exit pipe (HWL) is 2 m. Also, consider that the flow velocity inside the tank is negligible. The value of the actual head rise across the pump is = ? b) What would be the pump motor power if the efficiency is 60%? The value of the pump motor power is = ?