JNTU
JNTU B.Tech III WATER RESOURCES ENGINEERING-II Previous Question Paper (April - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is zone of storage of a reservoir?
Answer
The zone of storage in a reservoir refers to the volume of water held between the minimum pool level and the maximum reservoir level. It is primarily divided into useful storage (for irrigation, power, and water supply) and surcharge storage.
List the types of dams?
Answer
Dams are broadly classified based on their structural material and design into the following types:
- Gravity dams
- Earth dams
- Rockfill dams
- Arch dams
- Buttress dams
- Steel or timber dams
What is meant by gravity dams?
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Differentiate between a low gravity dam and high gravity dam.
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List the types of earth dams.
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What is a spillway?
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What are canal headworks?
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What are barrages?
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Write a short note on super passage.
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Why are drops constructed at irrigation canal?
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Part B
Discuss briefly the different types of reservoir and purpose served by each type.
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Illustrate with sketches and mention site conditions favorable for construction of dams.
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Describe briefly the techniques that are employed for computing the storage capacity of a reservoir for different water surface elevation.
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Explain the mass curve method that can be used for determining demand rate from a reservoir of a given capacity.
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Explain with sketch how you will find the uplift pressure on a gravity dam provided with drainage gallery.
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What is meant by the elementary profile of a gravity dam and how is it deduced?
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Discuss the evolution of final profile of a gravity dam from its elementary triangular profile, and explain the main principle of its design.
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What are the various modes of failure of a gravity dam? Discuss each of these briefly.
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Discuss a procedure of stability analysis for an earth dam having sudden drawdown conditions. Why sudden draw down of water level is considered harmful.
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Describe with neat sketches, the various types of bucket type energy dissipaters.
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Discuss the various causes of failure of earth dams.
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Classify and explain the stilling basins recommended according to the Indian Standards.
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What is silt excluder? Describe with neat sketches its working and design principles.
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Discuss Bligh’s Creep theory for design of weirs constructed over pervious foundations.
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Describe briefly the causes of failure of weirs on permeable foundation and their remedies.
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Sketch and describe the working of a silt ejector. On what basis is it designed?
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Discuss briefly the components of various types of fall with neat sketch.
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Explain the necessity of cross drainage structure. How do you classify cross-drainage works?
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Design 1 m Sarda type fall on a channel carrying 20 cumecs discharge whose bed width and water depth are 14 m and 1.9 m respectively.
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Discuss the design criteria for a siphon aqueduct.
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