Exam Details
| Subject | engineering chemistry | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Institute Of Aeronautical Engineering | |
| Position | ||
| Exam Date | July, 2018 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No Question Paper Code: AHS005
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
Four Year B.Tech I Semester End Examinations(Supplementary) July, 2018
Regulation: IARE R16
Engineering Chemistry
Time: 3 Hours (Common to All Branches) Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define electrode potential. Derive Nernrt equation for electrode potential.
What are reference electrodes? Explain construction working of colomel electrode with a neat
diagram.
2. Define battery. Explain the construction, working and applications of Ni-Cd cell.
A cell is farmed by dipping Nickel rod in 0.01M Ni2+ solution and lead rod in 0.5M pb2+ solution.
The standard electrode potentials of Ni and pb are -0.24V and -0.13V respectively. Write the
cell representation, cell reactions and calculate any of the cell
UNIT II
3. Explain the electrochemical corrosion mechanism of resting in Iron.
What is corrosion? Explain waterline corrosion and crevice corrosion.
4. What is cathodic protection? Explain corrosion control by impressed current cathodic protection.
Define metallic coating. Explain the method of tinning with a neat diagram.
UNIT III
5. Define temporary permanent hardness of water. Calculate the temporary hardness permanent
hardness of a sample of water collected from a pond which contains 16.2mg of Ca(Hco3)2,
29.2mg of Mg(Hco3)2, 33.3mg of Caso4, 18.0mg of MgSo4 and 55.0mg of Nacl per liter of water.
Define priming and foaming. Explain the formation of scales sludger in foiless.
6. Describe the method of softening of water by zeolite process. Mention its advantages and disadvantages.
What is potable water? Explain sterilization of water by chlorination and ozonization.
Page 1 of 2
UNIT IV
7. What are polymers? Explain preparation, properties and applications of poly vinyl chloride and
Teflon.
Define polymerization. Explain addition, condensation and co-polymerization with examples.
8. What are elastomers? Explain synthesis, properties and applications of Buna-s and Thiokol
rubber.
Define these terms: Cement, lubricant, viscosity, flash point, fire point, cloud point and pour
point
UNIT V
9. What is a fuel? Explain proximate analysis of coal and give the significance of proximate analysis.
Define cracking. Explain fixed bed catalytic cracking with neat diagram.
10. What is knocking? Explain octane number and cetane number.
What is calorific value. Distinguish between gross calorific value and net calorific value. Explain
their relation.
Page 2 of 2
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
Four Year B.Tech I Semester End Examinations(Supplementary) July, 2018
Regulation: IARE R16
Engineering Chemistry
Time: 3 Hours (Common to All Branches) Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Define electrode potential. Derive Nernrt equation for electrode potential.
What are reference electrodes? Explain construction working of colomel electrode with a neat
diagram.
2. Define battery. Explain the construction, working and applications of Ni-Cd cell.
A cell is farmed by dipping Nickel rod in 0.01M Ni2+ solution and lead rod in 0.5M pb2+ solution.
The standard electrode potentials of Ni and pb are -0.24V and -0.13V respectively. Write the
cell representation, cell reactions and calculate any of the cell
UNIT II
3. Explain the electrochemical corrosion mechanism of resting in Iron.
What is corrosion? Explain waterline corrosion and crevice corrosion.
4. What is cathodic protection? Explain corrosion control by impressed current cathodic protection.
Define metallic coating. Explain the method of tinning with a neat diagram.
UNIT III
5. Define temporary permanent hardness of water. Calculate the temporary hardness permanent
hardness of a sample of water collected from a pond which contains 16.2mg of Ca(Hco3)2,
29.2mg of Mg(Hco3)2, 33.3mg of Caso4, 18.0mg of MgSo4 and 55.0mg of Nacl per liter of water.
Define priming and foaming. Explain the formation of scales sludger in foiless.
6. Describe the method of softening of water by zeolite process. Mention its advantages and disadvantages.
What is potable water? Explain sterilization of water by chlorination and ozonization.
Page 1 of 2
UNIT IV
7. What are polymers? Explain preparation, properties and applications of poly vinyl chloride and
Teflon.
Define polymerization. Explain addition, condensation and co-polymerization with examples.
8. What are elastomers? Explain synthesis, properties and applications of Buna-s and Thiokol
rubber.
Define these terms: Cement, lubricant, viscosity, flash point, fire point, cloud point and pour
point
UNIT V
9. What is a fuel? Explain proximate analysis of coal and give the significance of proximate analysis.
Define cracking. Explain fixed bed catalytic cracking with neat diagram.
10. What is knocking? Explain octane number and cetane number.
What is calorific value. Distinguish between gross calorific value and net calorific value. Explain
their relation.
Page 2 of 2
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