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Previous Year Exam Questions of Water Supply and Sanitary Engineering of bput - WSSE by Verified Writer

  • Water Supply and Sanitary Engineering - WSSE
  • 2017
  • PYQ
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
  • Civil Engineering
  • B.Tech
  • 3785 Views
  • 167 Offline Downloads
  • Uploaded 1 year ago
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Registration No: Total Number of Pages: 02 B.Tech PCCI4402 7th Semester Regular/Back Examination 2017-18 Water Supply and Sanitary Engineering BRANCH : CIVIL Time: 3 Hours Max Marks: 70 Q.CODE: B221 Answer Question No.1 which is compulsory and any five from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) Q3 a) b) Answer the following questions: Define per capita demand. What is Coincident Draft? List the factors that govern the selection of a site for intake structure. (2 x 10) For the same solid content, if the quantity of sludge with moisture content of 98% is V, then what will be the quantity of sludge with moisture content of 96%? What is dirty skin? Define Time of Concentration. Explain Perched Aquifer with a neat sketch. What are the components of sedimentation aided with coagulation? What do you mean by specific yield and specific retention? Write the relation between them wrt the porosity. State the importance of recirculation in “Activated Sludge Process”. A 40 cm diameter well penetrates 30m below the static water table. After 24 hours of pumping @ 6000 L/min, the water level in a test well at 90 m is lowered by 0.64m and in a well 35 m away the drawdown is 1.11m. What is the transmissibility of the aquifer? Also determine the drawdown in the main well. What considerations govern the choice of particular type of pump in water supply engineering? (6) In a continuous flow settling tank 3m deep and 60m long, what flow velocity of water would you recommend for effective removal of 0.025 mm particles at 25 0 C. the specific gravity of particles is 2.65 and kinematic viscosity of water is taken as 0.01cm2/sec. Discuss about the disinfecting action of chlorine and break-point chlorination. (5) (4) (5) Q4 a) b) Discuss the merits and demerits of Slow Sand Filter and Rapid Gravity Filter. A filter unit is 4.5m by 9.0m. After filtering 10,000 cubic meter per day in 24 hours period, the filter is backwashed at a rate of 10 l/sq. m/sec. for 15 min. Compute the average filtration rate, quantity, percentage of treated water used in washing and the rate of wash water trough in each trough. Assume 4 troughs. (4) (6) Q5 a) (5) b) Mention any three methods of softening of water. Describe zeolite process of softening of water in detail. Differentiate between separate system and combined system of sewerage. a) Explain with neat sketch the working principle of trickling filter. (5) b) Calculate the velocity of flow and corresponding discharge in a sewer of circular cross section with diameter of 1 m, laid in a gradient of 1 in 500. The sewer runs at 0.6 times depth. Use Manning’s formula considering k= 0.012 . (5) Q6 (5)

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Q7 Illustrate with sketch different types of Layouts of Distribution Network. Compare their advantages and disadvantages. Q8 a) b) c) d) Write Short Notes on any Two : Sludge volume index (SVI) Cavity formation in wells Oxidation pond and oxidation ditch. Bulking of sludge (10) (5 x 2)

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