b. Answer with True (T) or False (F). 1. Relative Roughness may larger than l. 2. Moddy Diagram used to determine minor losses coefficient. 3. Re may use in орen channel.
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- A 300 mm cast-iron pipe is discharge 120 lit/sec. At a point 200 m from the reservoir the center of the pipe is 30 m below the reservoir surface. What is the pressure in kPa to be exerted there? Assume f= 0.02The difference in the water surface of the two reservoirs is 9m. The reservoirs are connected by a siphon of length 1000m and 0.2m diameter. The summit of the pipe is 3m above the water surface level of upper reservoir. The length of pipe from upper reservoir to the summit is 200m. Determine the discharge through the siphon and also the pressure at the summit. Take friction factor as 0.02 and neglect all minor losses.CALCULATION USING DARCY'S LAW An aquifer system is formed by two horizontal layers. Two piezometers were installed for monitoring, the distance between them is 885m. The upper layer (A) has a thickness of 39m and K = 1.3 x 10-5 m/s and the lower layer (B) has a thickness of 25m and K = 2.7 x 10-6 m/s. THE hydraulic load in the PZA is 60m and in the PZB it is 40m. Calculate the flow and the transmissivity of each layer.
- Two pipes are connected in series. If the roughness coefficient n2 = 2n1 and the diameter D1 = 600 mm, determine the diameter D2 if the slope of their energy grade lines should be same.A trapezoidal flume in the shape of a half-hexagonal has a base width of 1.5 m. It is laid at a slope "s", has a roughness coefficient "n" and the discharge is 3 cum/sec when flowing full. If the same material were used for the most efficient rectangular section . by how much would be the discharge decrease in cu.m/ sec? Use 2-decimal places What is the computed constant in (S^(1/2))/n? Use 3-decimal places What is the computed area of the rectangular channel/ Use 3-decimal placesThe pressure gauges are inserted at A and B in a vertical pipe converging water. The diameters at A and B are 150mm and 75mm respectively. The point B is 2.3m below point A. When rate of flow down the pipe is 0.021m³/s. The pressure at B is 117.72 KN/m² greater than at A. The losses in pipe between A and B are expressed as(KVa²/2g) where Va is velocity of A. Find the value of K. If the pressure gauges at A and B are replaced by tubes filled with water and connectef to a u-tube containing Hg(SHg=13.6) calculate the value of the reading manometer.
- The siphon in Fig. is used to draw water from the large open tank. If the absolute vapor pressure for the water is p = 0.91 kPa, determine the shortest drop length L of the 40 mm diameter tube that will cause cavitation in the tube. Draw the energy and hydraulic grade lines for the tube.if Manning's N=0.023 and Hydraulic radius=3 m , then value of Chezy constant is ________?A 1.20 m-diameter(internal)horizontal steel penstock conveys water at the rate of3.6 m3/s. The thickness of the pipe wall is 25 mm. Thebulk modulus of elasticity of water is 2.2 GPa. The pipehas length of 1000 m and the friction factor is 0.020. Thewater surface elevation in the reservoir is 60 m. If theflow is stopped completely by closing the valve in 2sec, determine the following:(a) the maximum water hammer pressure that candevelop.(b) the maximum pressure at the valve.(c) the elongation of the pipe in mm (△=ForcexL/AE) foran almost instantaneous closure.
- Water at 20°C ( ρ= 999.7 kg/m3 and μ=9.7720 x10-4 kg/m · s) is flowing steadily in a hexagonal cross sectional pipe b=1.5cm, 20-m-long at an average velocity of 1.2 m/s. Determine: (a) Hydraulic diameter. (b) The pressure drop. (c) The head loss. (d) The pumping power requirement to overcome this pressure drop.Estimate the equivalent hydraulic conductivity for flow in the horizontal direction. Also calculate the ratio of kv(eq)/kH(eq). Suppose that k1 = 15 x10^-4 cm/s, k2= 5.0x10^-4 cm/s, k3= 3.0 x10^-4 cm/s, k4= 2.0 x10^-4 cm/s, H1= 1.0 m, H2 = 2.0 m, H3 =1.5 m, H4 =1.0m. kH(eq) = kV(eq)/kH(eq)=aceeleration = 4.905 m/s^2 to the right What is the gage pressure at A? in kpa.