Gujarat Technological UniversitySummer 2025 examination

GTU 2160604 Water & Waste Water Engineering Summer 2025 Question Paper & PDF

B.E. · Civil Engineering · Semester 6 · Subject code 2160604
Download official PDFView PDF here
Share with your class
Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
No solutions on this paper yetNeed them for your exam? Ask once. Papers that students ask for are solved first, and we aim to add them within 24 hours.

Q.1

14 Marks
(a)
3 marks
How design period and location is selected for a water treatment plant?
(b)
4 marks

Explain grid iron system of water distribution network with its merits and demerits

(c)
7 marks

Draw a layout plan for a typical waste water treatment plant and explain function of each unit.

Q.2

14 Marks
(a)
3 marks
Discuss different methods of water supply.
(b)
4 marks

What is the necessity of water supply schemes? Enlist phases involved in water supply scheme.

(c)
7 marks

Explain the different factors affecting the water demand also discuss any one in detail.

(c)
7 marks

Design Plain sedimentation tank for water supply scheme having capacity to treat 10 MLD water.

Q.3

14 Marks
(a)
3 marks
Write short note on Break point chlorination.
(b)
4 marks

What do you mean by optimum dose of a coagulant? How optimum coagulant dose is determined?

(c)
7 marks
Explain with neat sketch septic tank and state its design criteria
(a)
3 marks
Define
1)Garbage
2)Rubbish
3)Sewage
(b)
4 marks

Differentiate between Plain sedimentation and sedimentation aided with coagulation

(c)
7 marks
Explain with neat sketch the working of trickling filter

Q.4

14 Marks
(a)
3 marks
What is recirculation of sludge?
(b)
4 marks
Draw a neat sketch of an elevated service reservoir showing all its components.
(c)
7 marks

Why sludge digestion is required? Explain the stages of sludge digestion. Enlist the factors affecting sludge digestion.

(a)
3 marks
Write short note on water softening.
(b)
4 marks
Write a short note on sludge drying bed.
(c)
7 marks
What is an intake structure? Sketch and explain in details about river intake.

Q.5

14 Marks
(a)
3 marks
Define the following terms: Flocculation, F/M Ratio, Detention time.
(b)
4 marks

Differentiate between suspended growth process and attached growth process used for biological treatment of wastewater

(c)
7 marks
Describe the following in detail.
1)Grit Chamber
2)Activated sludge process
(a)
3 marks
Write a short note on Centrifugal pumps.
(b)
4 marks
Write short note on Rotating biological contactors
(c)
7 marks

An average operating data for conventional activated sludge treatment plant is as follows: Wastewater flow=30000 m³/day, volume of aeration tank = 10000 m³, influent BOD=250 mg/l, Effluent BOD = 20 mg/l, MLSS=2500 mg/l, Effluent SS = 30 mg/l, waste sludge SS = 9000 mg/l, qty. of waste sludge = 200 m³/d.

Other Semester 6 subjects

BE Civil

2160601
Advanced Construction and Equipments
2160602
Applied Fluid Mechanics
2160607
Elementary Structural Design
3160608
Urban Transportation Planning

Preparing with friends?

Send this paper to your class group. Every question has its own link.

About this paper

Official Gujarat Technological University (GTU) examination paper for Water & Waste Water Engineering (Summer 2025, B.E. · Civil Engineering, Sem 6). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

Download official PDF All Water & Waste Water Engineering Papers (1) →Report a typo or correction
ViewDownload PDF