1.For a flow of 0.8 m3/s, how many rapid sand filter boxes of dimensions 10 m 10 m are needed for a hydraulic loading rate of 110 m3/d · m2?
2.Air at 80 degree Celsius R=287 m square per sec square- k and a pressure of 1350 kpa absolute, flows in 20mm diameter tube
3.A streamlined, high-speed train travels at 200 km/hr. The flow over the train is similar to flow over a flat plate. Estimate the boundary layer thickness at the end of the train, which is 125 m long. The temperature is 10°C.