Download JNTUA B.Tech 1-1 R15 2016 Dec Regular 15A51101 Engineering Chemistry Question Paper

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Code: 15A51101

B.Tech I Year I Semester (R15) Regular & Supplementary Examinations December 2016
ENGINEERING CHEMISTRY
(Common to ECE, ME, EIE and IT)
Time: 3 hours Max. Marks: 70

PART ? A
(Compulsory Question)

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1 Answer the following: (10 X 02 = 20 Marks)
(a) Write any two disadvantages of hard water.
(b) Define caustic embrittlement.
(c) Write any two engineering applications of Buna-S.
(d) Write short note on silicones.
(e) What is galvanic corrosion?
(f) Give examples for cathodic and anodic inhibitors.
(g) Write any two characteristics of fuel.
(h) What is cetane number?
(i) Write any two applications of acidic refractory material.
(j) Write short note on fullerenes.

PART ? B
(Answer all five units, 5 X 10 = 50 Marks)

UNIT ? I

2 (a) What is breakpoint chlorination? Explain its significance.
(b) Explain desalination of brackish water by electrodialysis method.
OR
3 (a) Explain zeolite method for the treatment of water.
(b) Explain any three boiler troubles.

UNIT ? II

4 (a) Differentiate between thermosetting and thermoplastic resins.
(b) Explain the synthesis and applications of polyacetylene.
OR
5 (a) Explain cationic mechanism.
(b) What are inorganic polymers? Write their applications.

UNIT ? III

6 (a) Derive Nernst equation.
(b) Explain electrochemical theory of corrosion.
OR
7 (a) What are the factors affecting corrosion based on nature of metal?
(b) Explain in detail about cathodic protection.

UNIT ? IV

8 Write the manufacture of metallurgical coke by Otto Hoffmann?s by product oven method and
write advantages and disadvantages of power alcohol.
OR
9 What is octane number? Explain the refining of petroleum.

UNIT ? V

10 Write the composition of cement and explain setting and hardening of cement.
OR
11 Explain thick film, thin film and extreme pressure lubrication.
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R15
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