Question 3 a) It is required to place an orifice in the side of a tank at such an elevation that the jet will a maximum horizontal distance from the tank at the level of its base. attain Where do you think would be the preferred distance from the orifice to the free surface when the depth of liquid in the tank is maintained at 1.2 m? Your comment. AN (7) b) Ghana Water Company ensure healthy water supply to its customers at all times. In most small water supply systems, however, economic reasons prevent 24-hour daily water supply services to the customers. This poses a risk of polluted water infiltrating into the pipelines through leaks in pipe joints and service taps. Recommend to Ghana Water Company to ensure that water supplied to end users do not pose a health risk to them. Suggest also, any two factors to consider when selecting material for a pipe. AP (8) c) A laminar flow element measures low gas-flow rates with a bundle of capillary tubes packed inside a large outer tube. Consider oxygen flowing at 84 ft/min in a 4-in-diameter pipe. (a) Is the flow approaching the element turbulent? (b) If there are 1000 capillary tubes, Length L, is 4 in, select a tube diameter to keep Reynold's number below 1500 and also to keep the tube pressure drop no greater than 0.5 lbf/in. (c) Do the tubes selected in part (b) fit nicely within the approach pipe? AP (5) d Pitot-static probe will be used to measure the velocity distribution in a drain. The two pressure lines from the probe will be connected to a U-tube manometer which uses a liquid of specific gravity 1.7. The maximum velocity expected in the water tunnel is 2.3 m/s. Your job is to select an appropriate U-tube from a manufacturer which supplies manometers of heights 8, 12, 16, 24 and 36 inches. The cost increases significantly with manometer height. Which of these would you recommend? AN (5)