Shivaji University 2006 B.E Mechanical Engineering S.E(Mechanical)(part-I), - Question Paper

S.E(Mechanical)(part-I)Examination,2006
Subject:MATERIALS AND MANUFACTURING PROCESSES
Time:3 Hours.
Marks:100

Instructions:
1)Attempt any 3 ques. from every part.
2)Draw neat figures wherever necessary.


SECTION-I

1.a)Draw Fe-Fe3C equilibrium diagram.Show all temperatures, compositions and phases.[Marks 9]
b)How S.G.Iron is manufactured?Give composition, properties and applications of S.G.Iron.[Marks 9]

2.provide composition,properties and applications of the subsequent (any four)[Marks 4*4]
a)Babbits
b)Duralumin
c)Hadfield steel
d)Nichrome
e)H.S.S
f)Invar

3.discuss why(any four):[Marks 4*4]
a)Copper is often added to babbits.
b)Al-si alloy is typically replaced.
c)Grey cast iron is used for machine tool beds.
d)Lead is added to free machining brasses.
e)Martensitic stainless steel is suitable for surgical instruments.
f)F.R.P. is used for roofing sheets.

4.Write short notes on(any four):[Marks 4*4]
a)Nichrome
b)Carbon equivalent in cast iron.
c)Soldering process.
d)Weld decay in stainless steel.
e)Specifiacations of steel.
f)Hastelloy.


SECTION-II

5.define the subsequent clearly and fully(any six):[Marks 6*3]
a)Pattern
b)Core
c)Gating system
d)Mould
e)Melting charge.
f)Fettling
g)Mechanized foundry.
h)Chills
i)Chaplets.

6.Draw neat, self-explanatory sketches of the following(any four):[Marks 4*4]
a)Induction furnace
b)Pit kind crucible furnace
c)Spiral test for fluidity
d)Impact extrusion
e)Wire drawing
f)Bottom pouring ladle.

7.a)Explain construction, operation and working of cupola furnace.[Marks 10]
b)Explain developements in cupola.[Marks 6]

8.Write short notes on (any four):[Marks 4*4]
a)Deep drawing
b)Centrifugal casting
c)CO2 moulding
d)Shot blasting
e)Jolt-squeeze moulding machine
f)Pollution control in foundry

Earning:   Approval pending.