JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III ENVIRONMENTAL ENGINEERING Previous Question Paper (May/June - 2019 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory (25 Marks). Part B consists of 5 Units (50 Marks). Answer any one full question from each unit.
Part A
Answer all questions in Part A.
Define Arithmetical Increase method.
Answer
The Arithmetical Increase Method is a population forecasting technique used when the rate of population growth is assumed to be constant over time. It assumes that the population increases by a fixed amount in each decade, regardless of the current population size.
Where Pn is the future population, Po is the last known population, n is the number of decades, and I is the average increase per decade.
What are the recommended values in LPCD of water supply for domestic needs?
Answer
According to the Indian Standard Code (IS 1172:1993), the recommended water supply for domestic needs in a residential building is typically 135 LPCD (Liters Per Capita Per Day). This includes:
- Bathing: 55 LPCD
- Washing of clothes: 20 LPCD
- Flushing of WCs: 30 LPCD
- Washing of house: 10 LPCD
- Washing of utensils: 10 LPCD
- Cooking: 5 LPCD
- Drinking: 5 LPCD
What are the factors that influence sedimentation process?
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Define coagulation. Mention different chemical coagulants used in water treatment.
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Mention Hazen-Williams formula.
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Give examples for various types of pipes used in water supply projects.
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What are the advantages of Inverted Siphon?
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What is sewage pumping station? Mention the design consideration of sitting and orientation of each pumping station.
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Give the formula of head loss through clean flat bar screens.
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Difference between Screening and Grit removal.
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Part B
What are the chemical tests to be conducted to the water? Explain briefly.
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Mention the factor to consider during design of intake structures.
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What is meant by fluctuations in rate of demand in Water Quantity estimation and how it is calculated.
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Explain Infiltration Gallery with Operation and maintenance aspects.
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Give the formula of stokes law and where it is used.
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Write about disinfection kinetics and explain about break point reaction.
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What is Multimedia filters?
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Design a rectangular sedimentation tank to treat 2.4 million liters raw water per day. The detention period may be assumed to be 3 hours.
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Explain about grid iron system with neat sketch.
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Write about Dry Weather flow and which are the factors indicate the occurrence of Dry Weather flow.
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List and explain the factors to be considered in selecting pipe materials for water supply.
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Write short note on the estimation of storm water runoff.
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How pumping of sewage is different than pumping of fresh water?
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Write a short note on specific speed of the centrifugal pumps.
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What are the advantages of Flushing tank and Inverted siphons?
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Write about the characteristics of sewage.
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Design a grit chamber of population 50,000 with water consumption of 135 LPCD.
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Write a short note on skimming tank.
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Explain in detail the process flow of trickling filters.
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