GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- V(OLD) EXAMINATION - SUMMER 2019
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Subject Code:150603 Date:31/05/2019
Subject Name:Environmental Engineering
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) How water demand for a city is calculated? Differentiate surface water and ground water sources as per their quality. 07
(b) Classify microbes? Describe with sketch main four phases of the microbial growth. 07
Q.2 (a) Give the standard definition of BOD and derive the equation for first stage BOD. 07
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(b) What is self-purification of river water bodies? Explain its different processes. 07
OR
(b) Describe re-oxygenation and de-oxygenation processes and explain oxygen sag curve schematically. 07
Q.3 (a) Draw layout of house drainage system and discuss the salient features of its components. 07
(b) Differentiate (i) one pipe and two pipe system of plumbing (ii) Nahani trap and Gully trap 07
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OR
Q.3 (a) Define (i) Rubbish (ii) Garbage (iii) Soot (iv) Aerosol (v) Sullage (vi) COD (vii) soil pipe (viii) water seal 07
(b) Describe different methods of solid waste disposal and compare them 07
Q.4 (a) Discuss the chemical characteristics of solid waste and calculate 5 day BOD at 20°C if 3 day BOD at 30°C is 110 mg/L and Kp at 20°C is 0.1 07
(b) Explain different methods of solid waste collection and conveyance used in India 07
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OR
Q.4 (a) Enumerate different physical, chemical and biological characteristics of water and discuss any one in detail. 07
(b) What is dB? Discuss the effects of noise pollution on human beings and their remedial measures 07
Q.5 (a) Describe the effect of particulate matter and carbon monoxide as air pollutants on humans’ health. 07
(b) Schematically, describe the functioning wet scrubber and bag house as air pollution control device. 07
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OR
Q.5 (a) What are primary and secondary air pollutants? Discuss their effects on humans 07
(b) What is EIA? Discuss the methodologies of conduction of EIA 07
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