Jawaharlal Nehru Technological University Anantapur 2011 B.Tech Mechanical Engineering I Year s, ember-uary, -2012, ENGINEERING CHEMISTRY (Set-4) - Question Paper

Code No: R05010301 - R05 - Set No. 4

B. Tech I Year Examinations, December-January, 2011-2012

ENGINEERING CHEMISTRY
Common to Mechanical Engineering, Mechatronics, Production Engineering, Automobile Engineering

Time: three hours. Max. Marks: 80.
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ans any 5 ques.
All ques. carry equal marks
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1. (a) provide an account of the disadvantages of hardwater.
(b) Distinguish ranging from temporary and permanent hardness of water. [8+8]

2. (a) elaborate the anodic coatings? explain 1 important method
(b) Write note on Lacquers. [8+8]

3. (a) describe flash and fire points.
(b) explain the important functions of lubricants. [16]

4. How can you prevent corrosion by
(a) Using inhibitors.
(b) Modifying the environment. [8+8]

5. (a) elaborate the functions of lubricants?
(b) Write a note on extreme pressure lubrication. [8+8]

6. Write a comparative account of the zeolite process and deionisation process for softening of hardwater. [16]

7. (a) discuss Higher Calorific Value and Lower Calorific Value and distinguish the both.
(b) elaborate the characteristics of a good fuel? [8+8]

8. (a) What is a plastic?
(b) Write the merits and demerits of using plastics in place of metals?
(c) discuss the differences ranging from a thermoset and thermoplastic material with examples. [4+6+6]

Earning:   Approval pending.