Es 65 Drill 2

1.Gas is flowing through a square conduit whose section gradually changes from 150 mm (section 1) to 300 mm (section 2). At section 1, the velocity of flow is 7 m/s and the density of gas is 1 kg/m3 while at section 2 the velocity of flow is 2 m/s. Calculate the mass flow rate and the density of the gas at section 2.

2. A pipeline with a pump leads to a nozzle as shown. Find the flow rate when pump develops an 80 ft (24.4 m) head. Assume head lost in the 6-inch (152 mm) pipe to be five times its velocity head while the head lost in the 4-inch (102 mm) pipe to be twelve time its velocity head. (a) Compute the flow rate, and (b) find the pressure head at the suction side.

3. Water flows freely from the reservoir shown through a 50-mm diameter pipe at the rate of 6.31 lit/sec. If the head lost in the system is 11.58 Joule/N, determine the elevation of the water surface in the reservoir if the discharge end is at elevation 4 m.

4. An open cylindrical tank, 2.4 in. in diameter and 6 m has I m of glycerin (s.g = 1.5), 2.5 m of water, and 1.5 m of oil (s.g.= 0.82). Determine the discharge through the 125 mm diameter located at the bottom of the tank. Assume C = 0.65.

5. A 150 mm diameter horizontal Venturi meter is installed in a 450-mm- diameter water main. The deflection of mercury in the differential manometer connected from the inlet to the throat is 375 mm. (a) Determine the discharge neglecting head lost. (b) Compute the discharge if the head lost from the inlet to the throat is 300 mm of water, and (c) what is the meter coefficient?

6. A Pitot tube in the pipe in which air is flowing is connected to a manometer containing water as shown in the figure. If the difference in water levels in the manometer is 87.5 mm, what is the velocity of flow in the pipe, assuming a tube coefficient, Ct 0.99?