GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (Old) EXAMINATION - WINTER 2019
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Subject Code: 160604 Date: 11/12/2019
Subject Name: Water & Waste Water Engineering
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) What are the different types of intakes required for water treatment plant? Explain any one with design criteria. 07
(b) What is meant by economical diameter of rising main? Explain factors affecting the selection of pump. 07
Q.2 (a) What are the different methods of forecasting population? Explain simple graphical method and comparative graphical method. 07
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(b) Draw a layout of water treatment plant showing the different treatment units and explain each unit in brief. 07
OR
(b) What are the advantages of plain sedimentation? Describe circular sedimentation tank with help of neat sketch. 07
Q.3 (a) What is filtration process of water treatment plant? Explain theory of filtration. 07
(b) Define plain chlorination, post chlorination, super chlorination and dechlorination. Write the various forms of chlorine. 07
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OR
Q.3 (a) Explain different systems of water distribution with help of neat sketch. 07
(b) What is sewage? Describe how the quantity of sewage of a city is estimated. 07
Q.4 (a) Differentiate between sanitary sewage and storm sewage? Explain variation in sewage flow. 07
(b) What is self cleaning velocity? Describe method of designing of sewer. 07
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OR
Q.4 (a) What are the different types of sewer appurtenances? Explain any two in detail. 07
(b) Differentiate between screening and skimming. Describe various types of screens. 07
Q.5 (a) Write theory of sewage sedimentation. Describe design criteria of sewage sedimentation-tank. 07
(b) Classify the different type of sewage filters and explain any one with help of neat sketch. 07
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OR
Q.5 (a) What is activated sludge process? Explain aeration units in brief. 07
(b) Write short note on low cost sanitation system. 07
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