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Total No. of Pages: 2
Register Number: 8348
Name of the Candidate:
B.Sc. DEGREE EXAMINATION - 2012
(CONSTRUCTION MANAGEMENT)
SECOND SEMESTER
(paper – VIII)
230. PUBLIC HEALTH ENGINEERING
May) (Time: 3 Hours
Maximum: 75Marks
Answer One Question from each Unit(5 15 = 75)
UNIT – I1. / i) / What do you understand by ‘water quality standards? State at least 10 important standards for water quality for drinking purposes. / 8
ii) / The census records of a city show population as follows:
Present = 5000; Before one decade = 47100; Before two decades = 43500; Before three decades = 41000. Work out the probable population after one, two and three decades by using arithmetical increase method. / 7
(OR)
2. / i) / List the factors to be considered while selecting site for a intake structure. / 7
ii) / What is fire demand? Explain the methods by which it can be calculated. / 8
UNIT – II
3. / i) / Explain the theory of sedimentation. / 8
ii) / What are the factors affecting dosage of coagulants? / 7
(OR)
4. / i) / Distinguish between flocculation and coagulation. / 10
ii) / How settling tanks are classified / 5
UNIT – III
5. / i) / Discuss in detail the slow and filters with reference to their essential parts, working and cleaning, rate of filtration and efficiency. / 8
ii) / List the various joints adopted in water supply pipes. Explain any two with neat sketches. / 7
(OR)
6. / i) / Explain the theory of disinfection of water by chlorine. / 7
ii) / Explain the Hardy-Cross method of analysis of complex pipe networks. / 8
UNIT – IV
7. / i) / Explain the BOD test and its limitations. / 7
ii) / List the various sewer appurtenances used in sewerage system and explain significances of each. / 8
(OR)
8. / i) / Draw and explain the cycles of decomposition of sewage under aerobic condition. / 8
ii) / State and explain the different materials and shapes of which the sewers and made. / 7
UNIT – V
9. / i) / With the aid of sketches, describe the principles involved in the design and construction of bar screen. / 8
ii) / Explain the construction and working principle of oxidation Pond. / 7
(OR)
10. / i) / Explain with the help of neat sketch, the construction and working of a conventional trickling filter. / 7
ii) / Design a septic tank for 200 users. Water allowance is 120 lits. per head per day. Detention period may be taken as 8 hours. Assume any other suitable data. / 8
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