University Of Pune Question Paper
S.E. (Mech. S/W) Examination, 2011
PRODUCTION METALLURGY
(2003 Course)
Time : 3 Hours Max. Marks : 100
Instructions: i) Answer 1 or 2, 3 or 4, 5 or 6 from Section – I and
7 or 8, 9 or 10, 11 or 12 from Section – II.
ii) Answers to the two Sections should be written in separate
answer books.
iii) Neat diagrams must be drawn wherever necessary.
iv) Figures to the right indicate full marks.
v) Use of Logarithmic tables, slide rule, scientific electronic
calculator is allowed.
vi) Assume suitable data if necessary, state clearly the
assumptions you have made.
SECTION – I
1. a) Comment on the following properties of ceramics :
i) Fracture toughness
ii) Machinability
iii) Modulus of elasticity
iv) Thermal conductivity
v) Creep resistance
vi) Coefficient of thermal expansion. 6
b) Give classification of composite material 6
c) Give two applications of shape memory alloys. 4
OR
2. a) What are the various methods of manufacturing a composite component ?
How can hollow tubular components manufactured ? 6
b) Explain with neat sketch the blow moulding process of manufacturing
polymer components. 6
c) Give two advantages and two limitations of glass fibers used in the making
of composites. 4
3. a) Explain how fatigue test data is presented (S-N curves) ? Suggest methods
of improving fatigue resistance of metals. 6
b) Explain the following ultrasonic inspection techniques :
i) Pulse echo method
ii) Through transmission method
iii) Angle beam technique. 6
c) Differentiate between hot working and cold working. 4
OR
4. a) What is notch sensitivity ? Explain the significance of a notch in the
specimen of Charpy impact test. 6
b) What is the importance of P/D2 ratio in Brinell hardness test ? What are the
limitation of Brinell hardness test method ? 6
c) Give the advantages and applications of magnetic particle test. 4
5. a) How are steels classified on the basis of de-oxidation, amount of carbon
and alloying elements other than carbon ? 6
b) What is heat affected zone ? Explain weld decay and suggest methods to
avoid weld decay. 6
c) How are nodular cast irons manufactured ? How are they designated ? 6
OR
6. a) State one application each of the following steels :
i) Austenitic stainless steel
ii) EN 31
iii) Low carbon steel
iv) Medium carbon steel
v) High carbon steel
vi) X75W18CrV1 6
b) What is the effect of following alloying elements on the properties of steel ?
i) Carbon
ii) Chromium
iii) Nickel 6
c) Explain the effect of silicon and cooling rate on the structure and properties
of cast iron. 6
SECTION – II
7. a) What is critical temperature ? What are the various critical temperature lines
found in iron-iron carbide equilibrium diagram ? What are the changes
that occur at these lines ? 6
b) Why tempering is necessary immediately after hardening ? What are the
effects of tempering on the microstructure of hardened steel ? 6
c) What are quench cracks ? How can they be prevented ? 4
OR
8. a) Draw a neat and well labeled TTT curve for eutectoid steel and superimpose
CCR representing following heat treatments on the diagram
i) Martempering
ii) Austempering
iii) Annealing. 6
b) What is retained Austenite ? How is it eliminated ? 6
c) Differentiate between annealing and normalizing. 4
9. a) Explain the surface preparation processes necessary before electroplating of
components. 6
b) Why is case carburizing done ? Is a heat treatment after carburizing necessary ? 6
c) Differentiate between Nitriding and carburizing. 4
OR
10. a) Explain with neat figure the ion implantation method. 6
b) What is chemical vapour deposition ? What are its advantages and limitations ? 6
c) Differentiate between Flame hardening and Induction hardening. 4
11. a) Suggest suitable material for the following (any six) : 6
i) Heat exchanger tubing
ii) Cartridge case
iii) Contact switch for two wheeler horns
iv) Flexible bellows
v) Brazing rod
vi) Non-sparking tool
vii) Gate valve body.
b) What are Babbits ? Why copper addition is necessary in Tin based Babbits ? 6
c) Explain the classification of Aluminium alloys. What are the applications
of pure Aluminium ? 6
OR
12. Write short notes on any three : 18
a) Age hardening
b) Bearing materials
c) Effect of zinc on copper alloys
d) Modification of Aluminium alloys
e) Applications of copper and copper alloys.
_____________________
S.E. (Mech. S/W) Examination, 2011
PRODUCTION METALLURGY
(2003 Course)
Time : 3 Hours Max. Marks : 100
Instructions: i) Answer 1 or 2, 3 or 4, 5 or 6 from Section – I and
7 or 8, 9 or 10, 11 or 12 from Section – II.
ii) Answers to the two Sections should be written in separate
answer books.
iii) Neat diagrams must be drawn wherever necessary.
iv) Figures to the right indicate full marks.
v) Use of Logarithmic tables, slide rule, scientific electronic
calculator is allowed.
vi) Assume suitable data if necessary, state clearly the
assumptions you have made.
SECTION – I
1. a) Comment on the following properties of ceramics :
i) Fracture toughness
ii) Machinability
iii) Modulus of elasticity
iv) Thermal conductivity
v) Creep resistance
vi) Coefficient of thermal expansion. 6
b) Give classification of composite material 6
c) Give two applications of shape memory alloys. 4
OR
2. a) What are the various methods of manufacturing a composite component ?
How can hollow tubular components manufactured ? 6
b) Explain with neat sketch the blow moulding process of manufacturing
polymer components. 6
c) Give two advantages and two limitations of glass fibers used in the making
of composites. 4
3. a) Explain how fatigue test data is presented (S-N curves) ? Suggest methods
of improving fatigue resistance of metals. 6
b) Explain the following ultrasonic inspection techniques :
i) Pulse echo method
ii) Through transmission method
iii) Angle beam technique. 6
c) Differentiate between hot working and cold working. 4
OR
4. a) What is notch sensitivity ? Explain the significance of a notch in the
specimen of Charpy impact test. 6
b) What is the importance of P/D2 ratio in Brinell hardness test ? What are the
limitation of Brinell hardness test method ? 6
c) Give the advantages and applications of magnetic particle test. 4
5. a) How are steels classified on the basis of de-oxidation, amount of carbon
and alloying elements other than carbon ? 6
b) What is heat affected zone ? Explain weld decay and suggest methods to
avoid weld decay. 6
c) How are nodular cast irons manufactured ? How are they designated ? 6
OR
6. a) State one application each of the following steels :
i) Austenitic stainless steel
ii) EN 31
iii) Low carbon steel
iv) Medium carbon steel
v) High carbon steel
vi) X75W18CrV1 6
b) What is the effect of following alloying elements on the properties of steel ?
i) Carbon
ii) Chromium
iii) Nickel 6
c) Explain the effect of silicon and cooling rate on the structure and properties
of cast iron. 6
SECTION – II
7. a) What is critical temperature ? What are the various critical temperature lines
found in iron-iron carbide equilibrium diagram ? What are the changes
that occur at these lines ? 6
b) Why tempering is necessary immediately after hardening ? What are the
effects of tempering on the microstructure of hardened steel ? 6
c) What are quench cracks ? How can they be prevented ? 4
OR
8. a) Draw a neat and well labeled TTT curve for eutectoid steel and superimpose
CCR representing following heat treatments on the diagram
i) Martempering
ii) Austempering
iii) Annealing. 6
b) What is retained Austenite ? How is it eliminated ? 6
c) Differentiate between annealing and normalizing. 4
9. a) Explain the surface preparation processes necessary before electroplating of
components. 6
b) Why is case carburizing done ? Is a heat treatment after carburizing necessary ? 6
c) Differentiate between Nitriding and carburizing. 4
OR
10. a) Explain with neat figure the ion implantation method. 6
b) What is chemical vapour deposition ? What are its advantages and limitations ? 6
c) Differentiate between Flame hardening and Induction hardening. 4
11. a) Suggest suitable material for the following (any six) : 6
i) Heat exchanger tubing
ii) Cartridge case
iii) Contact switch for two wheeler horns
iv) Flexible bellows
v) Brazing rod
vi) Non-sparking tool
vii) Gate valve body.
b) What are Babbits ? Why copper addition is necessary in Tin based Babbits ? 6
c) Explain the classification of Aluminium alloys. What are the applications
of pure Aluminium ? 6
OR
12. Write short notes on any three : 18
a) Age hardening
b) Bearing materials
c) Effect of zinc on copper alloys
d) Modification of Aluminium alloys
e) Applications of copper and copper alloys.
_____________________
0 comments:
Pen down your valuable important comments below