Exam Details
| Subject | Materials Science | |
| Paper | ||
| Exam / Course | B.Tech. Civil (Construction Management) / (Water Resources Engineering)/ (Aero Space Engineering) BTCM-BTWRE | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 4 IET-204(A) I
B.Tech. Civil (Construction Management)
Term-End Examination
December, 2016
009S2
ET-204(A) MATERIALS SCIENCE
Time: 3 hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Use of calculator is permitted.
1. Draw and discuss TIT diagram. 7
Also show the Martempering and Austempering. 2x1 1/2
2. What is corrosion Explain. How does the corrosion process limit the life of the components? Explain with example. 5
List down the general corrosion protection techniques. Discuss anyone of them. 5
3. A piece of copper originally 350 mm long is pulled in tension with a stress of 270 MPa. If the deformation is entirely elastic, what will be the resultant elongation E for copper =11.0 x 10^4 MPa. 5
Discuss the tensile stress strain behaviour for brittle and ductile materials, with the help of suitable diagrams. 5
4. What is fracture Explain the Griffith theory for the above.
Derive o =(2yE/Ta)^1/2
Here
o =Stress
y= Surface energy
E =Modulus of elasticity
2a =Length of long axis
Give the assumptions also. 10
5. Explain briefly all four of the following: 4x2 1/2=10 Electron Hopping Ionic Conduction Activation Energy Meissner Effect
6. Write down the correct condition for the following stress -strain curves 5 <img src='./qimages/9505-6ai.jpg'> <img src='./qimages/9505-6aii.jpg'>
Define the following: 5 Stress at a point
(ii) Body forces
7. Explain the following with the help of examples: 2x5=10 Principle of X-ray Diffraction Neutron and Electron Diffraction
8. Define any five of the following: 5x2=10 Van der Waals Bond Pauli Exclusion Principle Fermi Level Covalent Bond Energy Band Gap Hybrid Orbital Bragg Diffraction
9. Can the same material exist in crystalline and amorphous form? Give some examples. How many atoms of silicon are there in a chunk of silicon weighing 0.5 kg? 2 3
Give the general classification of metals. 5
10. Define and draw the following: 5x2=10 Point Defect Vacancy Defect Edge Dislocation Screw Dislocation Mixed Dislocation
B.Tech. Civil (Construction Management)
Term-End Examination
December, 2016
009S2
ET-204(A) MATERIALS SCIENCE
Time: 3 hours Maximum Marks: 70
Note: Attempt any seven questions. All questions carry equal marks. Use of calculator is permitted.
1. Draw and discuss TIT diagram. 7
Also show the Martempering and Austempering. 2x1 1/2
2. What is corrosion Explain. How does the corrosion process limit the life of the components? Explain with example. 5
List down the general corrosion protection techniques. Discuss anyone of them. 5
3. A piece of copper originally 350 mm long is pulled in tension with a stress of 270 MPa. If the deformation is entirely elastic, what will be the resultant elongation E for copper =11.0 x 10^4 MPa. 5
Discuss the tensile stress strain behaviour for brittle and ductile materials, with the help of suitable diagrams. 5
4. What is fracture Explain the Griffith theory for the above.
Derive o =(2yE/Ta)^1/2
Here
o =Stress
y= Surface energy
E =Modulus of elasticity
2a =Length of long axis
Give the assumptions also. 10
5. Explain briefly all four of the following: 4x2 1/2=10 Electron Hopping Ionic Conduction Activation Energy Meissner Effect
6. Write down the correct condition for the following stress -strain curves 5 <img src='./qimages/9505-6ai.jpg'> <img src='./qimages/9505-6aii.jpg'>
Define the following: 5 Stress at a point
(ii) Body forces
7. Explain the following with the help of examples: 2x5=10 Principle of X-ray Diffraction Neutron and Electron Diffraction
8. Define any five of the following: 5x2=10 Van der Waals Bond Pauli Exclusion Principle Fermi Level Covalent Bond Energy Band Gap Hybrid Orbital Bragg Diffraction
9. Can the same material exist in crystalline and amorphous form? Give some examples. How many atoms of silicon are there in a chunk of silicon weighing 0.5 kg? 2 3
Give the general classification of metals. 5
10. Define and draw the following: 5x2=10 Point Defect Vacancy Defect Edge Dislocation Screw Dislocation Mixed Dislocation
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