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Posted Date: 24 Oct 2008 Posted By: ram Member Level: Diamond
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2008 Jawaharlal Nehru Technological University Mechatronics I B.Tech Supplimentary Examinations, Aug/Sep 2008,ENGINEERING CHEMISTRY Question paper
Code No: R05010301 Set No. 3
I B.Tech Supplimentary Examinations, Aug/Sep 2008
ENGINEERING CHEMISTRY
( Common to Mechanical Engineering, Mechatronics, Production
Engineering and Automobile Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Write a brief account on the following:
(a) Treatment of water for drinking purpose.
(b) Determination of chlorides in water. [8+8]
2. (a) What is meant by desalination? What is its significance?
(b) Explain the different methods used for the desalination of brackish water.
[4+12]
3. Justify the following statements by giving suitable examples.
(a) Electrochemical series gives a basis for the prediction of the process of corro-
sion.
(b) Design and material selection to help to control metallic corrosion. [8+8]
4. Explain the following terms: [16]
(a) Drying oil
(b) Thinners
(c) Driers
(d) Fillers.
5. (a) Identify the thermo sets and thermoplastics among the following:
i. PVC.
ii. Polyethylene.
iii. Silicone.
iv. Polyester fibre.
v. Bakelite.
(b) What is bakelite? How is it manufactured and mention its uses? [5+11]
6. Write short notes on the following properties of lubricants.
(a) Pour point
(b) Fire point
(c) Neutralization number
(d) Emulsification. [4x4]
7. (a) What are the functions of lubricants?
(b) Write a note on extreme pressure lubrication. [8+8]
8. (a) Define a Fuel? How chemical fuels are classified and give examples for each.
(b) What is meant by Calorific value of a fuel? Define calorie and kilocalorie.
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