Download VTU BE 2020 Jan ME Question Paper 15 Scheme 3rd Sem 5A5ME32 Material Science

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Third Semester B.E. Degree Examination, Dee.2 ' 020
Material Science
Time: 3 hrs. NI a x 80

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Note: Answer any FlIE fitll questions, choosing ONE Intl question
.
from each module.
73
P iv) Co-ordination number v) Automic packing factor. (05 Marks)

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b. Differentiate between Edge and Screw dislocation. (05 Marks)
.,3
c. Explain factors affecting diffusion. (06 Marks)
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7.
7!
Co -c)
OR
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C.. 7,- .
...v.: P. 2 a. Explain surface defects with neat sketches. (05 Marks)
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c
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u., b. Explain cup and cone fracture, with neat sketch. (05 Marks)
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F? c: oc c. Explain with neat stress - strain diagram, the mechanical properties of a material in plastic
-:
E: N

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+
range. (06 Marks)
,,- ..,.b
.

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Module-2
.,
. .: 3 a. Explain solidification in pure metals. (05 Marks)
0
..,...

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;.- c b. Define Solid Solutions. Explain the types of solid solutions. (05 Marks)
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C! 1
c. What is Hume Rothay's rule? Explain all the rules of Hume Rother's. (06 Marks)
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7: t
OR
c ----

?

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-c
to c
4 a. Lead (Pb) melts at 323
?
C and tin (S?) melts at 232

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?
C. Additions of S? to Pb lowers the
ct
-Ei k-
.: 17 ,5

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melting point Pb and addition of Ph to Sn also lowers the melting point of S
n
at 180
?
C, Liquid

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.v ct
,_ -
of composition 61.9 % S
n
, alpha (a) phase of composition 19.2 % S

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n
and beta (() phase of
c
-- ,?
composition 96.2 % S

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n
are in thermal equilibrium. The solubilities of Pb in S
r
, and S? in Pb at
0

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_
a room temperature are negligible.
,., ?.?
2" - ..,
i) Draw the Ph ? Sn diagram ii) Identify the reactions occurring at 180

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?
C
c.
:
. th- iii) Calculate the amount of phases in an alloy of composition 40% S,, at 1790

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?
C.
.,.c. -
.....
e

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i .0
(1.,
(08 Marks)
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v: ...c, b. Draw the neat sketch of Iron - Carbon diagram. Indicate all phases and explain 3 invariant

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c ?-
. a
L 4) reactions. (08 Marks)
72

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t 0
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Module-3
?- c
t :_

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.
5 a. Explain T - T - T diagram for eutectoid steel. (08 Marks)
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? - b. With a neat diagram, explain continuous cooling transformation diagram. (08 Marks)
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C
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c ,

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...: N
OR
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.

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6 a. Define Heat treatment. List its objectives. (05 Marks)
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b. Write the classification of heat treatment. (05 Marks)
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c. Explain age hardening heat treatment for non - ferrous materials. (06 Marks)
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Ei

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Module-4
7 a. What are Ceramics? List and explain processing of ceramics.
(07 Marks)
b. Explain mechanical properties of ceramics.

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(05 Marks)
c. List advantages and applications of ceramics.
(04 Marks)
1 of 2
Module-1

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? 1 a. Define the following : i) Unit cell ii) Lattice iii) Space lattice
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A
USN
C-.

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Third Semester B.E. Degree Examination, Dee.2 ' 020

--- Content provided by‍ FirstRanker.com ---

Material Science
Time: 3 hrs. NI a x 80
Note: Answer any FlIE fitll questions, choosing ONE Intl question
.
from each module.

--- Content provided by‍ FirstRanker.com ---

73
P iv) Co-ordination number v) Automic packing factor. (05 Marks)
b. Differentiate between Edge and Screw dislocation. (05 Marks)
.,3
c. Explain factors affecting diffusion. (06 Marks)

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u
L.'
7.
7!
Co -c)

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OR
. -
C.. 7,- .
...v.: P. 2 a. Explain surface defects with neat sketches. (05 Marks)
gi

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c
;
u., b. Explain cup and cone fracture, with neat sketch. (05 Marks)
s?Nra, II
F? c: oc c. Explain with neat stress - strain diagram, the mechanical properties of a material in plastic

--- Content provided by​ FirstRanker.com ---

-:
E: N
+
range. (06 Marks)
,,- ..,.b

--- Content provided by⁠ FirstRanker.com ---

.

Module-2
.,
. .: 3 a. Explain solidification in pure metals. (05 Marks)

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0
..,...
;.- c b. Define Solid Solutions. Explain the types of solid solutions. (05 Marks)
.7..
C! 1

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c. What is Hume Rothay's rule? Explain all the rules of Hume Rother's. (06 Marks)
ti u
7: t
OR
c ----

--- Content provided by​ FirstRanker.com ---

?
-c
to c
4 a. Lead (Pb) melts at 323

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?
C and tin (S?) melts at 232
?
C. Additions of S? to Pb lowers the
ct

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-Ei k-
.: 17 ,5
melting point Pb and addition of Ph to Sn also lowers the melting point of S
n
at 180

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?
C, Liquid
.v ct
,_ -
of composition 61.9 % S

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n
, alpha (a) phase of composition 19.2 % S
n
and beta (() phase of
c

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-- ,?
composition 96.2 % S
n
are in thermal equilibrium. The solubilities of Pb in S
r

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, and S? in Pb at
0
_
a room temperature are negligible.
,., ?.?

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2" - ..,
i) Draw the Ph ? Sn diagram ii) Identify the reactions occurring at 180
?
C
c.

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:
. th- iii) Calculate the amount of phases in an alloy of composition 40% S,, at 1790
?
C.
.,.c. -

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.....
e
i .0
(1.,
(08 Marks)

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: u
v: ...c, b. Draw the neat sketch of Iron - Carbon diagram. Indicate all phases and explain 3 invariant
c ?-
. a
L 4) reactions. (08 Marks)

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72

t 0
C: 041
Module-3

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?- c
t :_
.
5 a. Explain T - T - T diagram for eutectoid steel. (08 Marks)
E: .

--- Content provided by⁠ FirstRanker.com ---

s
>.
? - b. With a neat diagram, explain continuous cooling transformation diagram. (08 Marks)
(... '-.
C

--- Content provided by⁠ FirstRanker.com ---

>,
c ,
<
...: N
OR

--- Content provided by‍ FirstRanker.com ---

.42
.
6 a. Define Heat treatment. List its objectives. (05 Marks)
z;
b. Write the classification of heat treatment. (05 Marks)

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t
cv
c. Explain age hardening heat treatment for non - ferrous materials. (06 Marks)
t:
C,

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C:.
Ei
-.
Module-4
7 a. What are Ceramics? List and explain processing of ceramics.

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(07 Marks)
b. Explain mechanical properties of ceramics.
(05 Marks)
c. List advantages and applications of ceramics.
(04 Marks)

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1 of 2
Module-1
? 1 a. Define the following : i) Unit cell ii) Lattice iii) Space lattice
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LIB

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i.0,00?
Socie'
-

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15ME32
OR
8 a. What are Plastics? List processing of thermoplastics and explain any one method. (07 Marks)
b. Explain in brief the selection of engineering materials. (05 Marks)

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c. Explain NDT method for Residual life assessment. (04 Marks)
Module-5
9 a. Define Composite Materials. List their classification based on matrix and reinforced
constituents. (07 Marks)
b. Differentiate between thermoset and thermoplastic materials. (05 Marks)

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c. Write a note on Metal Matrix Materials. (04 Marks)
OR
10 a. List and explain various fibers used in preparation of composite materials.
b. Explain Powder metallurgy technique of production of composite materials.
c. With neat sketch, explain Squeeze casting.

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(07 Marks)
(05 Marks)
(04 Marks)
* * *
2 of 2

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