GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION — WINTER 2020
Subject Name:Material Science and Engineering
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
3. Figures to the right indicate full marks.
Q.1 (a) Define ionization potential and electron affinity. 03
(b) State and explain the classification of engineering materials. 04
Q.2 (a) Differentiate between edge dislocation and screw dislocation. 03
(b) Briefly discuss about the classification of polymers. 04
(c) Mention the classification of the structure of materials depending on the level and briefly discuss about each. 07
Q.3 (a) Explain secondary bonding and its significance. 03
(b) Define Pilling — Bedworth ratio and explain its significance. 04
(c) Discuss about the structure and crystallinity of long chain polymers with suitable illustrations. 07
(b) State the types of surface imperfections and explain each. 04
(c) With suitable illustrations, discuss about the structure-property relationship in materials. 07
Q.5 (a) Briefly discuss about the applications of phase diagrams. 03
(c) Draw the Iron — Iron carbide (Fe - Fe3C) phase diagram and briefly discuss about the phase transformations in steel. 07
Q.6 (a) Explain glass transition. 03
(b) Describe the precipitation process with a suitable example. 04
Q.7 (a) Explain plastic deformation by slip. 03
(b) Draw the tensile stress — strain curve for ductile material and discuss the significance of various regions. 04
(c) Explain the mechanism of creep. Also discuss about the importance of creep resistant materials. 07
Q.8 (a) Explain intrinsic semiconductor and extrinsic semiconductor 03
(b) Briefly discuss about soft and hard magnetic materials. 04
(c) Write a short note on super conducting phenomenon. 07
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION — WINTER 2020
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Subject Code:3150508 Date:22/01/2021Subject Name:Material Science and Engineering
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
Q.1 (a) Define ionization potential and electron affinity. 03
(b) State and explain the classification of engineering materials. 04
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(c) Discuss about the various methods of protection against corrosion in detail. 07Q.2 (a) Differentiate between edge dislocation and screw dislocation. 03
(b) Briefly discuss about the classification of polymers. 04
(c) Mention the classification of the structure of materials depending on the level and briefly discuss about each. 07
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Q.3 (a) Explain secondary bonding and its significance. 03
(b) Define Pilling — Bedworth ratio and explain its significance. 04
(c) Discuss about the structure and crystallinity of long chain polymers with suitable illustrations. 07
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Q.4 (a) Explain Frenkel defect and Schottky defect. 03(b) State the types of surface imperfections and explain each. 04
(c) With suitable illustrations, discuss about the structure-property relationship in materials. 07
Q.5 (a) Briefly discuss about the applications of phase diagrams. 03
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(b) Explain the lever rule used for calculating the fractions of two coexisting phases. 04(c) Draw the Iron — Iron carbide (Fe - Fe3C) phase diagram and briefly discuss about the phase transformations in steel. 07
Q.6 (a) Explain glass transition. 03
(b) Describe the precipitation process with a suitable example. 04
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(c) Stating the condition for the spontaneous occurrence of a phase transformation, discuss about the progressive transformation of a liquid to solid crystals by nucleation and growth with an illustration. 07Q.7 (a) Explain plastic deformation by slip. 03
(b) Draw the tensile stress — strain curve for ductile material and discuss the significance of various regions. 04
(c) Explain the mechanism of creep. Also discuss about the importance of creep resistant materials. 07
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Q.8 (a) Explain intrinsic semiconductor and extrinsic semiconductor 03
(b) Briefly discuss about soft and hard magnetic materials. 04
(c) Write a short note on super conducting phenomenon. 07
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