1. A test was performed in a wind tunnel by allowing air having a density of 1.2 kg/m to flow past a cylinder, 150 mm in diameter and 500 mm long with its axes normal to the air stream. The cylinder rotates at 300 rpm and the air velocity is 20 m/s. Assuming ideal flow, determine the following: a. Circulation b. The lift force C. The position of the stagnation points d. The cylinder rotational speed (rpm) for a single stagnation point. 2. Determine the power required to overcome the drag for a truck travelling at 60 km/h if the projected area is 8 m. Take Cd 0.9

of the tank. [6 marks] Question Two A tank 9 m deep and 5 m wide is layered with 4 m of oil, 3 m of water and 2 m of me Determine the total hydrostatic force and the resultant centre of pressure on the side. Sp gravity of oil is 0.8 and that of mercury is 13.6. [14 marks] Question Three A venturimeter of thro at diameter 100 mm is fitted to a vertical pipe of diameter 20 carrying oil of specitic gravity 0.8. The throat is 0.5 m above the entrance. A diffe mercury manometer shows a deflection of 400 mm. Neglecting losses, calculate the c rate and pressure difference between entrance and throat. Specific gravity of mercury [14 marks