Subject Code: 160604
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VI(OLD) - EXAMINATION - SUMMER 2019
Subject Name: Water & Waste Water Engineering
Time: 10:30 AM TO 01:00 PM
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 different water demands? Discuss factors affecting water demand. 07
(b) Why is population forecasted for calculation of water demand? Differentiate arithmetic and geometric increase method of population forecast. 07
Q.2 (a) Discuss theory of sedimentation and prove that settling velocity does not depends on depth of sedimentation tank. 07
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(b) Design the septic tank with soak pit for 150 users. Assume suitable data. 07
OR
(b) Describe different acrobic and anaerobic processes used to treat wastewater. 07
Q.3 (a) Differentiate dry well and wet well used for intake structure? Schematically describe reservoir and river intakes. 07
(b) What is discrete settling? Derive the equation for settling velocity for discrete particles in PST. 07
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OR
(b) Design a clariflocculator for discharge of 240 m3/hr. 07
Q.4 (a) Describe the working procedure of Rapid sand filter and Slow sand filter. 07
(b) Define velocity gradient and give the salient features and design criteria for flash mixer. 07
Q.5 (a) Draw the flow diagram of wastewater treatment plant and discuss the functioning of different units. 07
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OR
(b) Explain the mass curve method of finding capacity of ESR. 07
Q.5 (a) Compare gravity and pumping system of supply and explain any one water distribution network system in details. 07
(b) What are sewer appurtenances? Describe purpose of manhole and drop manhole with sketches. 07
Q.4 (a) What is HRTF? Design HRTF for wastewater flow of 4.0 MLD with recirculation ratio=1.4, BOD of raw wastewater=250 mg/l and desired effluent BOD=40 mg/l. 07
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OR
(b) Enlist different methods of chlorination and discuss method of Break point chlorination with chemical reactions. 07
Q.3 (a) Why is sludge digestion required? Discuss the different factors affecting the sludge digestion process. 07
Date: 18/05/2019
Total Marks: 70
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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