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Thursday, December 17, 2015

Annamalai University December 2014 Question Paper B.Sc.Construction Management : Applied Chemistry

Annamalai University december 2014 question paper
Time: Three hours Maximum: 75 marks
 Answer ONE FULL question from each UNIT (5 × 15 = 75)
1. a) A sample of water contains the following dissolved salts in mg/lit
Mg(HCO3)2=73; CaCl2=111 Ca(HCO3)2=81 and MgSO4=40. Calculate the
temporary and Permanent hardness of the water.
 b) How is internal treatment of boiler water carried out using phosphate
and calgon?
2. a) Describe the process of demineralisation of water using ion exchange
 b) What are the various methods by which disinfection of domestic water
is carried out? Explain.
3. a) What is meant by electrochemical corrosion? Explain its mechanism. (8)
 b) Give an account of Tinning and Galvanising. (7)
4. a) Explain sacrificial anodic protection method of controlling corrosion. (8)
 b) Explain any three methods of preparing the surface of metallic coating. (7)
5. a) Distinguish between thermoplastics and thermosetting resins. (7)
 b) Give the preparation, properties and uses of the following (i) Polyvinyl
chloride (ii) Bakelite.
6. a) Explain vulcanization of rubber. (7)
 b) Explain the injection moulding process with a neat diagram. (8)
7. a) Discuss four essential properties of good refractory material. (8)
 b) Give an account of the materials used in making insulators. (7)
8. a) What are electrical insulators? Write their characteristics and
engineering applications.
 b) Give the preparation, properties and uses of zirconia bricks. (7)
9. a) Explain (i) Flash and fire point. (ii) Cloud and pour point (8)
 b) Explain the mechanism of lubrication. (7)
10. a) How will you manufacture Portland cement by wet process? (8)
 b) Explain the setting and hardening of Portland cement with chemical
reaction involved in it.

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