All 8 questions
School of Information Technology, Engineering, Mathematics, and Physics Discipline of Civil Engineering Dr Alvin Lal School of Information Technology, Engineering, Mathematics and Physics Discipline of Civil Engineering CV322: Hydraulic Engineering Assignment 2 Total Marks: 80 Weighting: 15% Due Date: Week 12 (Friday – 11th November 2022 @ 11.59 pm) Question 1 (10 marks) During an experimental setup, liquid ammonia at 220°C is flowing through a 20-m-long section of a 5-mm-diameter copper tube at a rate of 0.09 kg/s. Calculate the pressure drop, the head loss, and the pumping power required to overcome the frictional losses in the tube. Question 2 (10 marks) In a residential area, water is transported at a rate of 1.5 m3/s via 70-cm-internal-diameter concrete pipes with a surface roughness of 3 mm and a total length of 1500 m. In order to reduce pumping power requirements, it is proposed to line the interior surfaces of the concrete pipe with 2-cm thick petroleum-based lining that has a surface roughness thickness of 0.04 mm. There is a concern that the reduction of pipe diameter to 66 cm and the increase in average velocity may offset any gains. Taking ρ = 1000 kg/m3 and v = 1 x 1026 m2/s for water, determine the percent increase or decrease in the pumping power requirements due to pipe frictional losses as a result of lining the concrete pipes. School of Information Technology, Engineering, Mathematics, and Physics Discipline of Civil Engineering Dr Alvin Lal Question 3 (10 marks) School of Information Technology, Engineering, Mathematics, and Physics Discipline of Civil Engineering Dr Alvin Lal Question 4 (10 marks) In a construction site, consider water flow through a wide channel at a flow depth of 8 ft. Now water flows through a sluice gate with a 1-ft-high opening, and the freely discharged outflow subsequently undergoes a hydraulic jump. Disregarding any losses associated with the sluice gate itself, determine the flow depth and velocities before and after the jump, and the fraction of mechanical energy dissipated during the jump. Question 5 (10 marks) In an experimental setup, water is to be transported at a rate of 10 m3/s in uniform flow in an open channel whose surfaces are asphalt lined. The bottom slope is 0.0015. Determine the dimensions of the best cross section if the shape of the channel is (a) circular of diameter D, (b) rectangular of bottom width b, and (c) trapezoidal of bottom width b. School of Information Technology, Engineering, Mathematics, and Physics Discipline of Civil Engineering Dr Alvin Lal Question 6 (10 marks) Question 7 (10 marks) Question 8 (10 marks) THE END