STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
What are the advantages of alloy steels over plain carbon steel.
4 M
1 (b)
Draw an equilibrium diagram for Ag-Cu system which are partially soluble in the solid state.The data is as follows:- Melting temp. of Ag=961°C, Melting temp. of Cu=1083°C, Eutectic composition-28.1% Cu, Eutectic temp. =7807deg;C, Solubility of Cu in Ag=8.8% Cu at 780°C, Solubility of Ag in Cu=92.1% Cu. The solubility in both decreases to 2% at room temperature. Discuss slow cooling of alloy with 6% Cu from liquids temperature.
6 M
1 (c)
Explain the weld decay in stainless steels.
3 M
2 (a)
Draw iron carbon equilibrium diagram.
4 M
2 (b)
Draw the microstructures of: 1) AISI 1020 steel.
2 M
2 (c)
State the Hume Rothery's rules of solid solubility.
4 M
2 (d)
What is coring? Which alloys show cored structures?
3 M
Answer any one question from Q3 and Q4
3 (a)
Explain secondary hardening.
2 M
3 (b)
What are the advantages and disadvantages of Induction hardening over Flame hardening.
4 M
3 (c)
Explain how corrosion can be prevented by taking care in proper design.
3 M
3 (d)
Explain what is anodic protection.
3 M
4 (a)
Draw self explanatory diagram for any one of the below:
1) Ausforming
2) Martempering
1) Ausforming
2) Martempering
2 M
4 (b)
Write short notes on ( Any one )
: 1) Carbonitriding
2) nitriding
: 1) Carbonitriding
2) nitriding
4 M
4 (c)
Explain min 4 types of corrosion .
4 M
4 (d)
What is cathodic inhibitors.
2 M
Answer any one question from Q5 and Q6
5 (a)
What is chilled cast Iron, how it is produced? Give its applications?
4 M
5 (b)
Draw microstructure: 1) Ferritic Spheroidal gray cast iron, 2) 4.3 eutectic cast Iron
4 M
5 (c)
Explain the cooling of 3.5 % carbon cast Iron from its melting temperature till room temperature.
4 M
6 (a)
What is Equivalent carbon in cast Iron. Explain role of individual element present in Equivalent carbon in cast iron.
4 M
6 (b)
Compare S.G. iron and Malleable iron with respect to microstructure, production, composition and one application each.
4 M
6 (c)
What are the advantages of cast iron over steels?
4 M
Answer any one question from Q7 and Q8
7 (a)
Give typical composition, property and application for the following ( any four):
1) LM14
2) Invar
3) statuary bronze
4) cartridge brass
5) Gun metal
1) LM14
2) Invar
3) statuary bronze
4) cartridge brass
5) Gun metal
12 M
7 (b)
Ni is used in measuring equipment justify its property for this application.
1 M
8 (a)
Explain classification of Cu base alloys based on the percentage of Cu and Zn? Explain role of Zn in brasses.
4 M
8 (b)
Write short note on 1) Dezincification 2) coring in Sn bronzes.
4 M
8 (c)
What are the requirements of bearing materials? explain with suitable example.
5 M
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