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Environmental Science and Engineering

Part-A1. Define the term Ecosystem

2. What are the types of ecosystem?3. What is an ecological pyramid?

4. What is terrestrial ecosystem? Give example.

5. What is aquatic ecosystem?6. What are biotic and abiotic components? Give Examples.

7. What are autotrophy and hetrotrophs? Give examples.

8. Name the bio geographical zones in India.9. Write any two functions of an ecosystem.

10. Define ecological succession.

12. What is pioneer community and climax community?

13. What is primary succession and secondary succession?14. What are the steps involved in process of succession.

15. What meant by food chain and food web?

16. What is meant by energy flow?17. Explain the importance of the protection of biodiversity.

18. What are endemic and endangered species?

19. Mention any two non-consumptive values of biodiversity.20. Explain term Xerarch and hydrarch succession.

21. Write the characteristics of estuarine ecosystem.

22. Define the term IN-SITU and EX-SITU conservation.23. Enumerate the human activities, which destroy the biodiversity.

24. Define the term biomagnification

25. Write a note on hot spots in India

26. What is meant by RED data book?27. What is meant by population explosion?

28. What does doubling time mean?

29. What is meant by Nasality and Mortality?30. What are the objectives of family welfare programme?

31. What are the reasons behind the increased population growth in the less developed nations compared

with developed nations.

Part-B

1. Explain the energy flow of ecosystem with the help of thermodynamics law.

2. Explain food chain, food web and its significance in detailed manner.3. Describe about Forest ecosystem

4. Explain about the Grass land ecosystem

5. Explain about the Desert ecosystem6. Write the different type of aquatic ecosystem, and explain about the river ecosystem

7. What are the main objectives of conservation of Biodiversity? State and explain the two basic

approaches to the wild life conservation.8. Explain about ecological succession.

9. Explain about different types of Ecological pyramids.

10. Explain the different values of biodiversity.11. What is biodiversity and what are the threats to biodiversity?

12. Discuss the environmental and social impact of growing population

13. Write a note on human rights

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B.S.A CRESCENT ENGINEERING COLLEGE

Department of Chemistry

CY1X01 Engineering Chemistry (PTA I)

1. What are boiler compounds? Give two examples?

2. Explain the term Break point of chlorination?

3. What is Priming? How is it prevented?

4. Differentiate the term Scale from sludge?5. Calgon treatment is superior to other treatments justify.

6. What are abrasives? How is it classified? Give an example.

7. What is Mhos sale of hardness?8. Write a note on caustic embritlement?

9. What are adhesives and adherents?

10. List out two advantages and limitations of adhesive bonding?11. Give the chemical treatment to remove dissolved oxygen.

12. Give the requirements of an ideal Refractory

13. Give the requirements of a Lubricant.

14. Sodium dihydrogen phosphate can not be employed for treating acidic water. Why?15. What is desalination? Explain the term Reverse osmosis.

16. What is meant by PCE in Refractories?

17. How does thermal conductivity affect the porosity?18. What is meant by blended oil?

19. What are extreme pressure additives?

20. Classify lubricants. How does MoS2 differ from graphite?

Part B21. With a neat sketch explain the process of demineralization and mention its

advantages and disadvantages.

22. Explain the following properties of a refractory (i) RUL, (ii) Refractoriness(iii)Dimensional stability and (iv) Thermal spalling.

23. Explain the various steps involved in the domestic water treatment?

24. Describe the various physical and chemical factors influencing adhesive action?25. What is desalination? Explain reverse osmosis with a neat sketch.

26. Describe the preparation, properties and the uses of alumina magnesite and

Zirconia refractories.27. Write a note on classification of adhesives?

28. What are boiler problems? Discuss the problems using hard water in boilers.29. What is potable water? What are the steps taken to obtain pure drinking water?

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30. Discuss in detail about the properties of lubricants.

31. Write a note on solid lubricants.32. Explain the classification of abrasives with examples.

33. Write a note on epoxy resins.

B.S.A CRESCENT ENGINEERING COLLEGEVANDALUR 48.

BRANCH: PT SEMSTER - III

SUBJECT CODE & PT1202 OCT DATE : 08.08.07 AN

TIME :1 1/ 2 Hrs MAXIMUM 50 MARKS

PART - A (10X2 =20 Marks)1. Write the IUPAC name for the following compounds.

CH3

|a) CH3 CH2- CH CH - COOH

|

CH2 CH3

b) CH2 CH == CH CH - OH|

CH2 CH3

2. Give the structural formulae for the following compounds.

(a) 1, 4- penta diene

(b) 6 chloro-2, 4, 5-trimethyl-3-hexanone

3 What do you understand by Electromeric effect? Illustrate with an example.

4 Give the possible isomers for a compound with a molecular formula C3 H6O.

5 Define the term asymmetric carbon .Explain it with an example

6 What are carbanions? Arrange the following according to their increasing stability.

Explain your answer _ _ - -

CH3 CH2 CH2 CH2 : , (CH3) C: , CH3 : , CH3 CH2 CH CH3 :

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