Download GTU BE/B.Tech 2019 Summer 6th Sem Old 160604 Water And Waste Water Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem Old 160604 Water And Waste Water Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:160604 Date:18/05/2019
Subject Name: Water & Waste Water Engineering
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

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 dose not
depends on depth of sedimentation tank.
07
(b) Design the septic tank with soak pit for 150 users. Assume suitable data. 07
OR
(b) Describe different aerobic 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
OR
Q.3 (a) Design a clariflocculator for discharge of 240 m3/hr 07
(b) Describe the working procedure of Rapid sand filter and Slow sand filter. 07

Q.4 (a) Define velocity gradient and give the salient features and design criteria for
flash mixer
07
(b) Draw the flow diagram of wastewater treatment plant and discuss the
functioning of different units
07
OR
Q.4 (a) Explain the mass curve method of finding capacity of ESR 07
(b) Compare gravity and pumping system of supply and explain any one water
distribution network system in details
07

Q.5 (a) What are sewer appurtenances? Describe purpose of manhole and drop manhole
with sketches
07
(b) 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
OR
Q.5 (a) Enlist different methods of chlorination and discuss method of Break point
chlorination with chemical reactions
07
(b) Why is sludge digestion required? Discuss the different factors affecting the
sludge digestion process
07

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