STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
What do you mean by widmanstaten structure? Explain the factors responsible for it.
4 M
1 (b)
What is nucleation? What are the types of nucleation mechanisms?
4 M
1 (c)
Draw a neat labelled Fe-Fe3C equilibrium diagram.
5 M
2 (a)
Draw and explain the cooling curve for off eutectic alloy.
4 M
2 (b)
Write a short note on sulphur printing.
4 M
2 (c)
How are steels classified on the basis of their carbon percentage? Give one application of each class.
5 M
Solve any one question from Q3 and Q4
3 (a)
Give classification of surface hardening treatments and explain any one process in detail with suitable example.
6 M
3 (b)
Is it possible to improve corrosion resistance by adapting proper design and fabrication? If Yes, explain 3 factors in design and fabrication to support your answer.
6 M
4 (a)
How intergranular corrosion can be prevented? Explain in detail.
6 M
4 (b)
What is hardenability? Explain any one method of evaluation of hardenability and discuss factors affecting hardenability.
6 M
Solve any one question from Q5 and Q6
5 (a)
What do you mean by chilled cast iron? Explain the chill test used to find out chill depth for such cast iron.
7 M
5 (b)
State various factors affecting the microstructure and properties of cast iron, Explain their influence in brief.
6 M
6 (a)
Compare white cast iron and Malleable cast iron on the basis of microstructure. Method of production, composition, mechanical properties and give one typical application of each.
7 M
6 (b)
Compare grey cast iron and S.G. iron on the basis of manufacturing method, microstructure, properties and applications.
6 M
Write true or false and justify your answer (any four):
7 (a)
Alpha brasses can be cold worked.
3 M
7 (b)
Invar is used in making measuring scales.
3 M
7 (c)
Bearing are manufactured from homogeneous materials.
3 M
7 (d)
Addition of zinc in brass is done for changing the colour of brass.
3 M
7 (e)
Any one-ferrous alloy can be strengthened by precipitation hardening.
3 M
8 (a)
Give typical composition, important properties and applications of the following (any three):
i) Elinvar
ii) Admiralty brass
iii) Sn-based babbits
Gun metal.
i) Elinvar
ii) Admiralty brass
iii) Sn-based babbits
Gun metal.
9 M
8 (b)
Aluminium alloys are widely used in aeronautics and automobile applications. Comment.
3 M
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