I Semester M.E. (Civil) Degree Examination, March 2013 ENVIRONMENTAL ENGINEERING 2K8EN 105(b) : Hydrology and Hydraulics in Environmental Engineering (Elective – I) Time : 3 Hours
Max. Marks : 100 Note : 1) Answer any five questions. 2) Missing data can be assumed suitably.
1. a) Explain in detail, the different methods to determine the yield of an open well. Give the relevant equations. b) During a recuperation test, the water level in an open well was depressed by 2.5 m and is recuperated by an amount of 1.8 m in 72 minutes. a) Determine the yield from a well of 3 m diameter under a depression head of 3.5 m. b) Also determine the diameter of the well to yield 10 lts/second under a depression head of 2.5 m. (10+10) 2. a) List the basic objectives of : 1) Water supply schemes 2) Waste water schemes. b) Fit a logistic curve by the method of selected points for a given data. tI= 2, t1 = 30, t2 = 58 and PI = 55.8, P1 = 138.6, P 2 = 251.8, P = Population in thousands.
(6+14)
3. a) Explain, how do you compute head loss due to friction in pipe lines. b) Find the equivalent length of 30 cm dia. pipe for the network shown below. Use Hazen Williams formula. (6+14)
P.T.O.
*EJM100*
EJM – 100
4. a) Discuss the various steps that are adopted in the design of sewers. b) Estimate the capacity and the size of circular sewer for the following data : 1) Maximum velocity of flow = 3 m/sec. 2) Area = 15 sq. km. 3) Population density = 200 person/heat 4) Average rate of sewage = 220 lpcd 5) Maximum flow is 100% in excess of average together with rainfall equivalent of 15 mm in 24 hours, all of which are runoff. (12+8) 5. a) Explain, with the help of a neat diagram, various systems of plumbing used for house drainage. b) Draw a typical house drainage plan of a residential building.
(10+10)
6. With neat sketches, explain the function and location of a) Man hole b) Non-return value c) Fire hydrant
(8+4+8)
7. a) Draw a neat sketch of a typical sewage pumping station. Showing all necessary components and also describe in brief the function of each component. b) Discuss the different types of pumps commonly adopted for sewage and storm water pumping. (10+10) 8. Write short notes on any four : 1) Design period 2) Method of sections 3) Forces on pressure conducts 4) Economical diameter of pumping main 5) Friction factor analysis 6) Recommended pressure in the distribution system. ———————
Hydrology and hydraulics in environmental engg.-I.pdf
7. a) Draw a neat sketch of a typical sewage pumping station. Showing all ... I.pdf. Hydrology and hydraulics in environmental engg.-I.pdf. Open. Extract.
... of distribution network. c) Find the equivalent pipe AD for the simple network ABCD as shown in fig. 1. Fig. 1. 8. Write short notes on any four : 1) Design period.
engineering?including up-to- date environmental implications. A chapter on computational hydraulics demonstrates the application of computational simulation.
