Answer Happy

2. (a) A fan is to produce an air speed of 20 m/s throughout the pipe loop shown in Figure Q2 (a). The galvanized iron pipe has a diameter of 3 m and each of the four 90° elbows has a loss coefficient of 0.3. For air, take u = 1.79 x 10- Pas and p = 1.23 kg/m². Determine the power added by the fan to the air. [14mks) 20m D = 3m 10m 132 fan Figure Q2 (a)

(b) In Figure Q2 (b), a u-tube manometer is used to connect two pipes holding the same fluid of density 1000 kg/m? What is the pressure difference between the two pipes if the manometer is filled with fluid with a relative density of 13.6? [6mks) Fluid density p Fluid density p ha = 1.5m h = 0.75m h = 0.5m Pman = 13.6 Figure Q2 (6)