Anna University Chennai 2005 B.E Mechanical Engineering /B.TECH :Chemitry II - Question Paper

B.E/B.TECH. DEGREE exam ,APRIL/MAY 2005
Second semester, Mechanical engineering
Chemitry II


Time:3 Hrs
Maximum: 100 marks


PART A (10 X two =20)


1. State the legal regulations of mass action

2. describe (a) phase (b) component.

3. What is a polymer alloy? provide 1 example.

4. What is a composite material?

5. describe :

(a) Single electrode potential

(b) EMF

6. elaborate sensors? elaborate he different kinds of sensors?

7. Distinguish the term ore from mineral.

8. What is meant by Froth floatation process?

9. provide the composition of (a) Brass (b) Bronze

10. What is meant by powder metallurgy?


PART B (5 X 16 =80)


11 (i) describe the terms as applicable to refractories:

(1) Thrmal spalling

(2) Dimentional stability

(ii) With a suitable example ,discuss the mechanism of SN2 rection.

(iii) What is Ellingham diagram ? Draw a typical diagram and explain its sailent features

12 (a) (i) describe polymer blend. What is the need for polymer blends?

(ii) provide the prearation of any 2 engineering plastics.

(iii) What is compounding of plastics? discuss

OR

(b) (i) What is SMC ? provide atypical formulation of SMC.

(ii) explain the different steps involved in the general methods of fabrication of ceramic wares.

(iii) What is a glass? explain the manufactue of glass.

13 (a) (i) What is reversible cell? discuss. provide 1 examle.

(ii) explain the mechanism of dry collision.

(iii) How will yuo measure the EMF of a cell? discuss

OR

(b) (i) What is sacrificial anodic protection method? discuss

(ii) Descibe the principle off electrowinning process.Mention 2 of its application.

(iii) With a neat sketch, discuss electrochemicla machining

14 (a) (i) elaborate vacuum metallurgy? Mention its advantages.

(ii) elaborate the different steps invovled in ore dressing?

(iii) discuss :

(1) Calcination

(2) Smelting

OR

(b) (i) provide the name of 2 heat resisting steels .Mention its uses.

(ii) define any 2 heat treatment processes of steel.

(iii) Enumerate the salient features of the phase diagram of Iron- carbon system.

15 (a) (i) explain the mechanism of biomolecular elimination reactions.

(ii) define the general method of manufactureof refractories.

(iii) Draw the phase diagram of Lead -Silver system and dicuss its salient features.

OR

(b) (i) What is compacting? How is it classified?

(ii) Mention the important application of powder metallurgy.

(iii) What is sintering ? provide a brief account kinds of sintering.

Earning:   Approval pending.