Sant Gadge Baba Amravati University 2007 B.Tech Automobile Engineering CHEMISTRY — II - Question Paper

CM 136 — CHEMISTRY — II

B.E. DEGREE EXAMINATION, 2nd Semester.

Automobile Engineering

Time : 3 hours Maximum : 100 marks
ans ALL ques..

PART A — (10 ´ two = 20 marks)
1. State the phase rule and discuss the different terms involved.
2. What is an eutectic system? provide an example and its use.
3. provide the classification of fuels.
4. What is cetane number? What is its significance?
5. Classify the refractories giving 1 example for every class.
6. describe flash point and fire point with reference to lubricants.
7. discuss the terms BOD and COD and their significance.
8. What is ozone layer? How is it depleted? What is the harmful effect of the depletion of ozone layer?
9. elaborate the components of a dry cell? elaborate their functions?
10. discuss the term green house effect.

PART B — (5 ´ 16 = 80 marks)

11. (i) How is water gas produced? provide its composition, fuel value and uses. (Cool
(ii) elaborate abrasives? provide their classification and 1 example for every class. How is carborundum prepared? (Cool

12. (a) provide a detailed account on the proximate analysis of coal and its importance. (16)
Or
(b) Write in detail the different steps involved in the refining of crude petroleum. provide a list of the fractions found and their uses. (16)

13. (a) explain in detail the iron–carbon phase diagram. (16)
Or
(b) What is powder metallurgy? provide an account on the different processing steps. (16)

14. (a) Write notes on :
(i) Acid rain and its harmful effects (Cool
(ii) Particulates causing air pollution and their effects. (Cool
Or
(b) explain in detail the primary and secondary treatment of domestic sewage. (16)

15. (a) (i) provide an account of the construction of lead acid battery and the chemistry of discharging and charging cycles. (10)
(ii) Write a note on solid lubricants. (6)
Or
(b) Write notes on :
(i) Properties of refractories. (10)
(ii) Requirements of an explosive. (6)

Earning:   Approval pending.