STUPIDSID
Solve any one question from Q.1(a,b,c) &Q.2(a,b,c)
1(a)
Explain the terms
i) Allotropy
ii) Solid solution
iii) Solidus line:
iv) Flow lines
i) Allotropy
ii) Solid solution
iii) Solidus line:
iv) Flow lines
4 M
1(b)
Inetching of a metallographic sample necessary to measure the gain size of a plain carbon steel sample? Explain why?
4 M
1(c)
What is metallography? What useful information can be obatained from it?
4 M
2(a)
Explain the terms
i) Slag inclusion
ii) Numerical aperture
iii) Sulpur segregation
iv) Empty magnification
i) Slag inclusion
ii) Numerical aperture
iii) Sulpur segregation
iv) Empty magnification
4 M
2(b)
State and explain Gibbs phase rule.
4 M
2(c)
What is spark test? What is its use?
4 M
Solve any one question from Q.3(a,b,c) &Q.4(a,b,c)
3(a)
What is meant by critical temperature line in a an euilibrium diagram? What changes take place, during cooling, at A1 temperature in an Iron-Iron carbide pahse diagram?
4 M
3(b)
Writer properties and applications of Grey cast iron.
4 M
3(c)
What is Retained austenite? List effect of Retained Austenite? Explain subzero treatment of elimination of retain austenite?
5 M
4(a)
Why carburising is carried out at a temperature range above 900°C
4 M
4(b)
What are the advantages of Nodular cast iron over gray cast iron? Draw a typical microstructure of Nodular cast iron.
4 M
4(c)
Explain why thicker sections are more susceptible to cracking during hardening heat treatment. Which heat treatment will you recommended?
5 M
Solve any one question from Q.5(a,b,c) &Q.6(a,b,c)
5(a)
Explain classification of steel
4 M
5(b)
Explain Heat Affected zone. Due to which manufacturing process is it formed?
4 M
5(c)
What is stainless steel? Explain classification of stainless steel based on microstructure.
4 M
6(a)
What is the effect of increasing cabon addition to steel on the following characteristics:
i) Hardeness
ii) Ductile to brittle transition temperature
iii) Ductility
iv) Amount of cementite
i) Hardeness
ii) Ductile to brittle transition temperature
iii) Ductility
iv) Amount of cementite
4 M
6(b)
Explain the effect of Nickel and Chromium on microstructure and Mechanical properties of steel.
4 M
6(c)
Explain the heat treatment of High speed steel.
4 M
Solve any one question from Q.7(a,b,c) &Q.8(a,b,c)
7(a)
Cartridge brass is easily cold worked but Muntz metal cannot be cold worked. Explain why it is so.
4 M
7(b)
State any two important properties of copper or copper alloys and explain how that is used in an application.
4 M
7(c)
Why is A1-12% Si(LM6) alloy a very popular casting material for automotive applications?
5 M
8(a)
What is modification treatment used in aluminium alloys? Why is it done?
4 M
8(b)
Write short note on Nickel and Nickel alloys
4 M
8(c)
Explain classification of Aluminium alloys.
5 M
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