STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Define the following:
i) Phase
ii) Ledeburite
i) Phase
ii) Ledeburite
4 M
1 (b)
What is 'isomorphous' system? Explain with one example of the same.
4 M
1 (c)
Draw Fe-Fe3C phase diagram and write the critical temperatures on it.
4 M
2 (a)
What is stainless steel? For surgical applications which group of stainless steel is used? Explain in detail.
4 M
2 (b)
Draw a self-explanatory cooling curves for binary eutectic.
2 M
2 (c)
With a neat diagram explain working of metallurgical microscope.
4 M
2 (d)
What do you understand by AISI 1090 and Fe-230.
2 M
Answer any one question from Q3 and Q4
3 (a)
While selecting any material in corrosion, what are the different factor taken into consideration?
6 M
3 (b)
Write a short note on Nitriding.
4 M
3 (c)
Explain strain hardening is one of best strengthening mechanism for pure metal.
3 M
4 (a)
A large size gear needs to be hardened, suggest a suitable heat treatment for the same and justify your answer.
3 M
4 (b)
What is Crevice corrosion? How it can be reduced?
3 M
4 (c)
Explain in brief ?Impressed current cathode protection?.
3 M
4 (d)
Show the following heat treatment on TTT diagram:
(i) Austempering
(ii) Conventional Hardening.
(i) Austempering
(ii) Conventional Hardening.
4 M
Answer any one question from Q5 and Q6
5 (a)
In which cast iron, carbon is not present in the free form? Explain the treatment ? Which converts cementite into free carbon-graphite. Draw the microstructure after heat treatment.
6 M
5 (b)
What is mottled cast iron ? Why the formation of this cast iron is avoided?
4 M
5 (c)
Discuss advantages of gray cast iron over white cast iron.
3 M
6 (a)
Write True or False and justify your answer:
(i) Chilled cast iron can be used for manufacturing wheels of road rollers.
(ii) Gray cast iron is used for manufacturing bearings.
(i) Chilled cast iron can be used for manufacturing wheels of road rollers.
(ii) Gray cast iron is used for manufacturing bearings.
6 M
6 (b)
Draw a microstructure of ferritic 'gray cast iron'.
2 M
6 (c)
What is Ni-Resist cast iron? How does it differ from Nicrosilal?
5 M
Answer any one question from Q7 and Q8
7 (a)
Give the composition of ?Duralumin?. What are its properties?
4 M
7 (b)
What is 'Naval Brass'? What are its applications?
4 M
7 (c)
How 'Invar' differs from 'Elinvar'? Compare their compositions and give one application of each.
4 M
8 (a)
What properties are required for bearing materials? Give composition of any one non-Ferrous alloy used as bearing.
4 M
8 (b)
Give typical composition, properties, applications of the following (any two): (i) Cap Brass
(ii) Statuary Bronze
(iii) Muntz metal
(iv) Leaded brass
(ii) Statuary Bronze
(iii) Muntz metal
(iv) Leaded brass
6 M
8 (c)
What is Zinc equivalence in brass?
2 M
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