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Dams & Hydraulic Structure (October 2009)

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Total No. of Questions : 12] P965 [Total No. of Pages : 3 [3664]-119 B.E. (Civil) DAMS & HYDRAULIC STRUCTURE (2003 Course) Time : 3 Hours] Instructions to the candidates : [Max. Marks : 100 1) Answer Q. 1 or Q. 2, Q. 3 or Q. 4, Q. 5 or Q. 6 from Section - I and Q. 7 or Q. 8, Q. 9 or Q. 10, Q. 11 or Q. 12 from Section - II. 2) 3) Answer any 3 questions from each section. Answer three questions from Section I and three questions from Section II. 4) Answers to the two sections should be written in separate books. 5) Neat diagrams must be drawn wherever necessary. 6) Figures to the right indicate full marks. 7) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 8) Assume suitable data, if necessary. SECTION - I Q1) a) Discuss the data required to be collected before the construction of a dam. [6] b) Explain Maintenance & strengthening of dams. (Give example) [6] c) Write short notes on : [6] i) Rockfill dams. ii) I.S. Guide lines for dam safety. OR Q2) a) Discuss the various factors which govern the selection of type of dam. b) Write short notes on any two: i) Application of remote sensing & GIS to watershed management. ii) Dam instruments Stress meter, Strain meter. iii) Factors affecting the selection of site for a dam. [18] P.T.O. Q3) a) Following data were obtained from the stability analysis of a gravity dam. Calculate maximum & minimum vertical stress, maximum principal stress. [6] 5 Total resisting moments @ toe = 1.5 10 t.m. Total overturning moments @ toe = 1 t.m. Total vertical force above base = 5 103 t Base width of dam = 50 m Slope of d/s face of the dam = 0.7 H : 1 V b) Discuss in brief various investigations required for reservoir planning.[7] c) Differentiate between low & high gravity dam. [3] OR Q4) a) Explain with sketch how you will find the uplift pressure on a gravity dam with drainage gallery. [6] b) Discuss the zone method of design of a gravity dam. [6] c) Explain various measures adopted to reduce reservoir losses. [4] Q5) a) Explain with sketches measures to control seepage through the foundation of earth dam. [6] b) Following data were recorded from an ogee spillway: Maximum reservoir level = 251 m Bed level of river = 229 m Highest flood level d/s = 234 m Maximum discharge = 5000 m3/s Effective length of spillway = 405 m Coeff. of discharge C = 2.2 Determine RL of crest of spillway. What type of energy dissipater will you suggest? [10] OR Q6) Write short notes on (any four): a) Tainter gate. b) Bucket type of energy dissipaters. c) Syphon Spillway. d) Criteria for safe design of earth dam. e) Critical conditions for stability of side slopes of an earth dam. [3664]-119 -2- [16] SECTION - II Q7) a) What are effects of construction of a weir on the river regime? What is a barrage? How does a barrage differ from a weir? [8] b) Discuss Bligh s creep theory for the design of weir on permeable foundation. [8] OR Q8) a) Explain Purposes served by a diversion head works. [5] b) Explain Selection of site for location of canal head works. [5] c) Explain Lane s weighted creep theory. [6] Q9) a) Differentiate between aqueduct & syphon aqueduct. State the factors affecting suitability of aqueduct. [8] b) What are the requirements of canal lining? Explain any one canal lining.[8] OR Q10) a) Describe the various considerations made in the alignment of canal. [8] b) Describe with the help of neat sketches any two types of cross drainage [8] works. Q11) a) What are the different river training works used for flood protection? [6] Explain any one in detail. b) Draw & explain Layout of a high head hydro-electric development [8] scheme. c) Explain Meandering of rivers. [4] OR Q12) Write short notes on : (any four) [18] a) Different types of hydropower plant & salient features of each. b) Levees-river training works. c) Different types of turbines, their main features & choice. d) Groyne s - river training works. e) Objectives of river training. rrrr [3664]-119 -3-

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Additional Info : 2003 Course
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