Download GTU B.Tech 2020 Summer 3rd Sem 3131904 Material Science And Metallurgy Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 3rd Sem 3131904 Material Science And Metallurgy Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? III EXAMINATION ? SUMMER 2020
Subject Code: 3131904 Date:28/10/2020
Subject Name: Material Science and Metallurgy
Time: 02:30 PM TO 05:00 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) Draw miller indices of [111] and (110).
03

(b) Define atomic packing factor (APF) and find APF
04
for FCC material.

(c) Do the detailed classification of Engineering
07
Material.


Q.2 (a) Grain boundary is a defect. Evaluate.
03

(b) Explain Lever rule with example.
04

(c) Explain homogeneous and heterogeneous nucleation
07
process with neat sketch.


OR


(c) Explain a Nucleation and growth in Solidification of
07
metals.
Q.3 (a) What is solid solution? Discuss in brief types of solid
03
solution with neat sketch.

(b) Write the difference between impurities and alloying
04
elements. Write importance of alloying.

(c) Explain cooling curve of binary alloy forming solid
07
solution.


OR

Q.3 (a) Explain Point defect & Line defect.
03

(b) Explain Hume Rothay rule for substitutional solid
04
solution.

(c) Explain the detail procedure of polishing the
07
specimen for micro-examination.
Q.4 (a) Differentiate between Austenite and Ferrite.
03

(b) W
hat are the limitations and capabilities of LPT
04

(c) Draw and label Iron ? Iron Carbide diagram. Also
07
explain the reactions taking place in it.

OR

Q.4 (a) Differentiate between LPT and MPT.
03

(b) Explain the Ultrasonic Testing.
04

(c) List the common methods of powder production in
07
powder metallurgy & discuss their influences on the
properties of final product.
Q.5 (a) Explain macro examination.
03

(b) Differentiate between annealing and normalizing.
04

(c) Draw TTT-diagram for a steel with 0.8% carbon and
07
show austenite to martensite transformations on it.


OR
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Q.5 (a) Which are surface heat treatment processes? What
03
are the applications of such processes?


(b) Define hardenability of steel. State the factor that
04
affect the hardenability.
(c) Explain the mechanism of corrosion. Also explain
07
any one corrosion prevention technique in detail.
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