Download JNTUA B.Tech 1-2 R15 2019 Dec Supple 15A51101 Engineering Chemistry Question Paper

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Code: 15A51101


B.Tech I Year II Semester (R15) Supplementary Examinations December 2019
ENGINEERING CHEMISTRY
(Common to CE, EEE, & CSE)

Time: 3 hours Max. Marks: 70

PART ? A
(Compulsory Question)

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1 Answer the following: (10 X 02 = 20 Marks)
(a) Define the term Alkalinity. Write the types of alkalinity.
(b) What is the difference between carbonate and non-carbonate hardness?
(c) Recall the term degree of polymerization.
(d) Mention any two uses of epoxy resin.
(e) How Ni-Cd battery is constructed?
(f) Define inhibitor. What are the types of inhibitors?
(g) Distinguish between proximate and ultimate analysis.
(h) Indicate the composition of water gas and producer gas.
(i) What is setting and hardening of cement?
(j) Define refractoriness.

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

UNIT ? I

2 Explain the determination of hardness of water by EDTA method.
OR
3 Explain internal conditioning of boiler treatment.

UNIT ? II

4 (a) How natural rubber processing? Explain vulcanization of rubber.
(b) Write note on compounding of rubber.
OR
5 Elucidate the preparation and properties of epoxy resin and Nylon-66.

UNIT ? III

6 Explain the chemistry of charging and discharging of lead acid batteries.
OR
7 Explain the sacrificial anodic protection and impressed current method with neat diagram.

UNIT ? IV

8 Analyze and infer on the results of coal by proximate method.
OR
9 Demonstrate the analysis of flue gases after combustion by using Orsat?s apparatus.

UNIT ? V

10 Discuss in detail about any five properties of refractories.
OR
11 Explain any two types of mechanism of lubrication with neat sketch.

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R15
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