Download GTU BE/B.Tech 2019 Winter 5th Sem New 2152106 Physical Metallurgy Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2152106 Physical Metallurgy Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152106 Date: 25/11/2019

Subject Name: Physical Metallurgy
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define Crystal & Unit cell. 03
(b) How do you identify a crystal system using lattice parameter? 04
(c) What is packing factor? Determine the Atomic Packing factor of BCC.
lattice.
07

Q.2 (a) Draw crystal planes and direction of followings:
a) (1 1 1
?
) b) (1 2 3) c) [1 1
?
1
?
]
03
(b) Explain constitutional supercooling. 04
(c) Write a short note on Solid solution. 07
OR
(c) With the concept of free energy explain the homogeneous nucleation. 07
Q.3 (a) Give classification of steel and cast Iron. 03
(b) Define the term component, phase, equilibrium & degree of freedom. 04
(c)
Why concentration of carbon in ?-Fe with BCC structure is less than ?-Fe with
FCC structure?
07
OR
Q.3 (a) What do you mean by curie temperature? 03
(b) Describe the ferrite, pearlite and cementite. 04
(c) Give the Hume-Rothery?s rules for substitutional solid solution. 07
Q.4 (a) Explain Allotropy of iron. 03
(b) Write a short note on ductile cast iron. 04
(c) Draw Fe-Fe3C diagram and explain all invariant reaction in this diagram. 07
OR
Q.4 (a)
Write effect of impurity elements on properties of steel.
03
(b) Where is the carbon atom located in iron lattice? 04
(c) Explain Gibbs? phase rule. 07
Q.5 (a) By Gibbs? phase rule, draw cooling curve for binary eutectic system. 03
(b) Explain coding of steel according to IS standard and American standard. 04
(c) What is Metallography? Explain specimen preparation techniques for
metallography.
07
OR

Q.5 (a) Draw a cooling curve for pure metal. 03
(b) Draw a labeled sketch of metallurgical microscope. 04
(c) Explain the phase diagram for Isomorphous system with example. 07

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