Environmental Science and Engineering 5th ND11 GE2021

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B.E/B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011

FIFTH SEMESTER

GE 2021 - Environmental Science and Engineering

MECHANICAL ENGINEERING

[REGULATION 2008]

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PART-A- [2 marks each]

1. Differentiate between food chain and food web.
2. Define Genetic diversity and species diversity.
3. Classify the sources of Air Pollution.
4. What is marine pollution?
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.
10. Differentiate between HIV and AIDS.

PART-B

11.(a) (i). Explain the role of producers, consumers and decomposers in an ecosystem. [Marks 8]
(ii). What are the major factors that are responsible for the loss of biodiversity? Explain [Marks 8]
(or)
(b) Explain the characteristics features of
(i). Forest Ecosystem [Marks 8]
(ii). Aquatic ecosystem Marks 8].

12.(a) (i). Explain the activated sludge process with a flow diagram. [Marks 8]
(ii). What is BOD? Explain how BOD is determined for a wastewater. [Marks 8]
(or)
(b) (i). What is noise? How is noise pollution controlled? Suggest suitable steps. [Marks 8]
(ii). Discuss the role of an individual in pollution prevention. [Marks 8]

13.(a) (i). Explain the environmental effects of Deforestation. [Marks 8]
(ii). Discuss the benefits and problems of dams. [Marks 8]
(or)
(b) (i). Enumerate the adverse effects of Modern Agriculture on soil and water sources. [Marks 8]
(ii). What is renewable energy? Write a brief note on any two energy sources. [Marks 8]

14.(a) (i). Discuss the ways to minimize radiation exposure in case of a nuclear accident. [Marks 8]
(ii). Explain the salient feature of the Environmental (protection) Act, 1986 [Marks 8]
(or)
(b) (i). Discuss the chemistry of ozone depletion. [Marks 8]
(ii). What is rain water harvesting? How are the rain water harvesting methods classifieds? Briefly explain. [Marks 8]

15.(a) (i). Draw a typical population pyramid of developing country and discuss. [Marks 8]
(ii). Explain the Environmental problems posed by population explosion. [Marks 8]
(or)
(b) (i). Explain the steps that are being taken in India to impart the value education [Marks 8]
(ii). Discuss the role of Information Technology in the protection of Environment and Human Health. [Marks 8]