GE 2021 — ENVIRONMENTAL SCIENCE AND ENGINEERING

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					                          B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
                                                     Fifth Semester
                                               Mechanical Engineering
                               GE 2021 — ENVIRONMENTAL SCIENCE AND ENGINEERING
                       [Common to Sixth Semester – Petroleum Engineering, Fifth Semester –
                         Aeronautical Engineering, Automobile Engineering, Electronics and
                    Communication Engineering and Production Engineering – Third Semester –
                       Computer Science and Engineering, Civil Engineering and Information
                             Technology and Fourth Semester – Biomedical Engineering]
                                                   (Regulation 2008)
                                     Time : Three hours Maximum : 100 marks
                                                Answer ALL questions.




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                                            PART A — (10 × 2 = 20 marks)
  1. Differentiate between food chain and food web.
  2. Define Genetic diversity and species diversity.




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  3. Classify the sources of Air pollution.
  4. What is marine pollution?




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  5. Define Food security.
  6. What are the factors that contribute to land degradation?
  7. What is sustainable development?
  8. State the effects of Acid rain?
  9. Define the term doubling time in connection with population growth.




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  10. Differentiate between HIV and AIDS.
                                            PART B — (5 × 16 = 80 marks)



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  11. (a) (i) Explain the role of producers, consumers and decomposers in an ecosystem. (8)
  (ii) What are the major factors that are responsible for the loss of biodiversity? Explain. (8)
  Or
  (b) Explain the characteristic features of
                                              og
  (i) Forest eco system. (8)
  (ii) Aquatic ecosystem. (8)
  12. (a) (i) Explain the activated sludge process with a flow diagram. (8)
  (ii) What is BOD? Explain how BOD is determined for a wastewater. (8)
                                                            Or
                                      l
  (b) (i) What is noise? How is noise pollution controlled? Suggest suitable steps. (8)
                                   .b

  (ii) Discuss the role of an individual in pollution prevention. (8)
  13. (a) (i) Explain the environmental effects of Deforestation. (8)
  (ii) Discuss the benefits and problems of dams. (8)
                          er


                                                            Or
  (b) (i) Enumerate the adverse effects of Modern Agriculture on soil and water sources. (8)
  (ii) What is renewable energy? Write a brief note on any two renewable energy sources. (8)
  14. (a) (i) Discuss the ways to minimize radiation exposure in case of a nuclear accident. (8)
              n



  (ii) Explain the salient features of the Environment (Protection) Act, 1986. (8)
                                                            Or
           or




  (b) (i) Discuss the chemistry of ozone depletion. (8)
  (ii) What is rain water harvesting? How are the rain water harvesting methods classified? Briefly explain.
  (8)
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  15. (a) (i) Draw a typical population pyramid of developing country and discuss. (8)
  (ii) Explain the Environmental problems posed by population explosion. (8)
                                                            Or
  (b) (i) Explain the steps that are being taken in India to impart value education. (8)
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  (ii) Discuss the role of Information Technology in the protection of Environment and Human Health. (8)
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