Subject Name : Engineering Materials and MetallurgySubject Code: ME2253

farrowbrainUrban and Civil

Nov 15, 2013 (3 years and 7 months ago)

97 views



Subject Name : Engineering Materials and Metallurgy

Subject Code: ME2253


UNIT
-
I


2MARKS


1. What is the meaning of material science?

2. How are materials classified?

3. In what respect

'Conductors' differ from ‘Semiconductors’?

4.

Give the classification of magnetic materials.
Explain




briefly the following mechanical properties of metals

5. Explain Elasticity, Plasticity, Ductility, Malleability and Hardness.

6. Write a short n
ote on 'Superconductivity'


7. Explain briefly the process of crystallization of pure metal.

8. What do you mean by 'Dendritic solidification’? Show with the help of a




diagram various step involved in the formation of crystal.

9. Explain
briefly the following:

(i)


Unit cell



(ii)


Space lattice
(iii)


Space lattice groups.

10. What do you mean by 'Allotropy of metals' '? Explain.



16MARKS


1.Draw
Fe
-
C diagram

and mark all the phasesand

explain the reactions? Solid phases in Fe
-
Fe
3
C phase diagram?

2.What are the
different types of cast iron
? Draw the microstructure of any four types of cast
iron?

3.
Isomorphous phase diagram

for Cu
-
Ni system ?Ideal phase diagram(soluble and insoluble)

4.E
xplain
Hume Rothery rule

?

5.Explain the different types of carbon steel?


UNIT
-
II


2MARKS

1
. State the objects of "annealing".

2
.Explain
full
annealing processes.

3. What is accomplished by normalising ?

4
. Describe the "critical rate" of quenching.

5
.Nam
e and explain the various quenching media used for heat treatment of steel.

6
. Explain hardening methods :

7
. Describe with a neat sketch Jominy hardenability test.

8
.Write a
s
hort note on 'Sub
-
zero treatment of steel'.

9
. What is the purpose of tempering?

10
. What do you mean by "Age hardening"?




16MARKS



1.Types of
annealing Process

and explain it?

2.
Explain
Isothermal Transformation diagram(TTT)
or(c
-
curve)or(s
-
curve)

3.Explain Tempering process ? and explain
CCT
diagram?

4.Explain :
Martempering and
Austempering


5.Explain case hardening process:


i
.Carburising

ii)carbonitriding iii)
induction hardening

iv)Nitriding v)
Flame hardening


UNIT
-
III


2MARKS

1.Describe briefly any two of the following non
-
destructive tests

2.
Name
the
important
mechanical
test

which give valuable information

about metals and alloys.

3.What
does
impact
test signify
?

Explain with necessary formulations,

the procedures to be adopted in the impact test.

conducted
on
a
pendulum

type impact
testing machine.

4.What are

different
hardness tests of interest to the testing engineer under

various situations ?

5.Explain the
Brinell
hardness testing of mild steel specimen.

6.What is

a
'rebound
test'

?
How is it carried out ?

7.What
is a fatigue failure ? How is a fatigue test carried o
ut?

8.Explain
briefly the procedure of conducting a torsion test.

9.What is creep ?

10. Draw a typical creep curve and explain the different stages of creep.


UNIT
-
IV

2MARKS

1.

State the effects of adding following alloying elements to steel:

Nickel,


Chromium,.

2.

Give the composition, properties and uses of the following alloy steels :



High speed

steel,


Silicon steel
.


3.

Enumerate the physical and mechanical properties of aluminium.

4.

State the importance of commercially pure aluminium as a gen
eral


engineering material.

5.

How is copper manufactured '?

6.

What are the commercial alloys of aluminium? Briefly describe their




composition and

uses.

7.

What are the typical alloys of copper used in engineering'? Describe


briefly their composi
tion and uses.

8.

What are the pronounced effects of beryllium on the physical properties


of copper'?

9.

What are the compositions, structure
and
characteristics of copper tin



bronzes ? Why are these alloys used for springs ?

1
0.

What are the requir
ements of an alloy
to be used as a bearing metal




16MARKS



1.
Types of
austenitic stainless steel

and explain?

2.
Effect of alloying addition in steel.(types of alloy steel)

3.Explain HSS and
HSLA

steel.

4.Types of
Copper alloy

and explain?

5.Types
of Al
alloy

and explain?

6.
Precipitation strengthening
.
and explain
bearing alloy


UNIT
-
V



2MARKS

1.Short

notes on following materials:

i)
PVC ii)PMMA


2.What is FRB?

3.What is Elastomers?

4.
What is babbit ?

5.

What is temper embrittlenient ? How is it avoided

?

6.Explain engineering ceramics.

7.Describe glass manufacturing method?

8.What is Fiber reinforced plastics.



16MARKS


1.Short

notes on following materials:

i)
PVC ii)PMMA

iii)PE iv)PP v)
PEEK

vi)PET

2.Types of
Engineering ceramic materials.

3
.
short

notes on
Elastomers

and Composites

4.Explain
FRP
and FRC

5.(i)
Plastic and polymer Properties and application



(ii)Thermo and thermosetting plastics


(iii)addition and co polymerization

6.special properties in polymer(
i.Mechanical.ii,Thermal,iii,Electrical)