Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2160604 Water And Waste Water Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2160604 Date:30/11/2018
Subject Name:Water & Waste Water Engineering
Time: 02:30 PM TO 05:00 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) Give the classification of intake. 03
(b) Differentiate between slow sand filter and rapid sand filter 04
(c) Design a plain sedimentation tank for treating 10 MLD of water 07
Q.2 (a) What are the objectives of water treatment 03
(b) State and explain different components of water supply scheme 04
(c) Explain with neat sketch the working of trickling filter 07
OR
(c) Enlist different types of pipes used for water supply. Explain Cast iron pipe in
detail.
07
Q.3 (a) How will determine the optimum dose of a coagulant for a given quality of raw
water
03
(b) Explain different factors affecting the selection of a proper water treatment train. 04
(c) A main combined sewer is to be designed to serve an area of 20 sq. km with a
population density of 250 persons/hectare. The average rate of sewage flow is
300 litres/capita/day. The maximum flow is 60% in excess of average together
with the rainfall equivalent of 15 mm in 24 hours, all of which appears as runoff.
Determine the capacity of the sewer. Taking the maximum velocity of flow as
2.0 m/s, determine the size of the circular sewer.
07
OR
Q.3 (a) Define: 1. Super chlorination 2. Dechlorination 3. Post chlorination 03
(b) What are the requirements of a good distribution system? 04
(c) Explain different layouts of distribution network with their relative advantages
and disadvantages.
07
Q.4 (a) Write a short note on soak pit. 03
(b) What is rising main? Explain how you will find out economical diameter of rising
main and head loss in rising main.
04
(c) Draw a typical flow sheet of a municipal wastewater treatment plant and explain
the functions of each unit.
07
OR
Q.4 (a) Explain how symbiotic relationship between algae and bacteria is used in
oxidation pond used for treatment of sewage.
03
(b) Explain break point chlorination. 04
(c) Explain the need of low cost sanitation system. Explain the design steps of septic
tank
07
Q.5 (a) Differentiate between separate and combined sewerage system. 03
(b) Differentiate between trickling filter and activated sludge unit. 04
(c) Enlist different sewer appurtenances and describe deep man hole in detail. 07
OR
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2160604 Date:30/11/2018
Subject Name:Water & Waste Water Engineering
Time: 02:30 PM TO 05:00 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) Give the classification of intake. 03
(b) Differentiate between slow sand filter and rapid sand filter 04
(c) Design a plain sedimentation tank for treating 10 MLD of water 07
Q.2 (a) What are the objectives of water treatment 03
(b) State and explain different components of water supply scheme 04
(c) Explain with neat sketch the working of trickling filter 07
OR
(c) Enlist different types of pipes used for water supply. Explain Cast iron pipe in
detail.
07
Q.3 (a) How will determine the optimum dose of a coagulant for a given quality of raw
water
03
(b) Explain different factors affecting the selection of a proper water treatment train. 04
(c) A main combined sewer is to be designed to serve an area of 20 sq. km with a
population density of 250 persons/hectare. The average rate of sewage flow is
300 litres/capita/day. The maximum flow is 60% in excess of average together
with the rainfall equivalent of 15 mm in 24 hours, all of which appears as runoff.
Determine the capacity of the sewer. Taking the maximum velocity of flow as
2.0 m/s, determine the size of the circular sewer.
07
OR
Q.3 (a) Define: 1. Super chlorination 2. Dechlorination 3. Post chlorination 03
(b) What are the requirements of a good distribution system? 04
(c) Explain different layouts of distribution network with their relative advantages
and disadvantages.
07
Q.4 (a) Write a short note on soak pit. 03
(b) What is rising main? Explain how you will find out economical diameter of rising
main and head loss in rising main.
04
(c) Draw a typical flow sheet of a municipal wastewater treatment plant and explain
the functions of each unit.
07
OR
Q.4 (a) Explain how symbiotic relationship between algae and bacteria is used in
oxidation pond used for treatment of sewage.
03
(b) Explain break point chlorination. 04
(c) Explain the need of low cost sanitation system. Explain the design steps of septic
tank
07
Q.5 (a) Differentiate between separate and combined sewerage system. 03
(b) Differentiate between trickling filter and activated sludge unit. 04
(c) Enlist different sewer appurtenances and describe deep man hole in detail. 07
OR
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2
Q.5 (a) What is water softening? When it is required? Enlist different methods used for
water softening.
03
(b) Explain how will find the capacity of an elevated service reservoir in a water
distribution system.
04
(c) Why preliminary treatment is needed before primary and secondary treatment of
wastewater. Explain working of any two units used for preliminary treatment of
wastewater.
07
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This post was last modified on 20 February 2020