JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year ENVIRONMENTAL ENGINEERING Previous Question Paper (July/August - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is flocculation?
Answer
Flocculation is the process of gentle agitation or slow mixing of water following the addition of a coagulant. This process encourages the collision of destabilized colloidal particles, allowing them to agglomerate into larger, settleable particles known as flocs.
Write the sources of water.
Answer
The primary sources of water are categorized as follows:
- Surface water sources: Rivers, streams, lakes, ponds, and reservoirs.
- Sub-surface (groundwater) sources: Open wells, tube wells, infiltration galleries, and springs.
- Rainwater: Collected directly from rooftops or catchment areas.
Write down the objectives of coagulation.
Answer
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Give the main causes for disinfection.
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List out any two merits of pumps and joints.
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Mention the classification of sewers.
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What are cycles of decay?
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Under what circumstances do you prefer drop manhole?
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Define waste water treatment.
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Write the applications of biological treatment.
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Part B
What are the good qualities of a good disinfectant? Compare the properties of any two disinfectants.
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List the suitability and criteria for choosing different types of pumps used in water supply.
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What is meant by flocculation in demand. How is this information used in water supply system design?
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What are the common impurities found in natural water and explain its effects on the quality.
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Mention the troubles occured during operation of filters.
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Write a brief notes on sedimentation process.
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Explain the merits and demerits of filters.
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Explain the general outline of water treatment units.
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Explain the merits and demerits of water carriage system.
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Give the advantages and disadvantages of the valves and joints.
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Write a short notes on air valves and check valves.
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Explain about storm water overflows.
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What are traps. Explain traps with neat sketch.
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Explain any one type of plumbing system in detail.
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State any six requirements of good drainage system.
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Write a brief notes on ultimate disposal o sewage.
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Explain the construction and working of septic tank.
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Write a brief notes on soak pits.
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Explain the method of sludge drying.
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Draw the flow chart of an activated sludge process.
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