Download GTU BE/B.Tech 2018 Winter 3rd Sem Old 131904 Material Science And Metallurgy Question Paper

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Subject Code: 131904

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-III (OLD) EXAMINATION — WINTER 2018

Date: 05/12/2018

Subject Name: Material Science And Metallurgy

Time: 10:30 AM TO 01:00 PM

Instructions:

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

Q.1

1. Define (i) Creep, (ii) Malleability (iii) Hardness (iv) Resilience (v) Ductility (vi) Toughness (vii) Plasticity [07]

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2. Explain Ultrasonic testing with advantages and limitations [07]

Q.2

1. Explain any two methods for production of metal powders. [07]
2. What is solid solution? Explain types of solid solution and significance of Hume Rothery’s Rules [07]

OR

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1. State composition and specific applications of (i) Muntz metal (ii) German silver (iii) Naval brass [07]
2. Define Heat Treatment. Explain the importance of TTT diagram in heat treatment [07]

Q.3

1. What is Gibb’s phase rule? Define system, phase and degree of freedom. Show that the degree of freedom at eutectic point in a binary phase diagram is zero. [07]
2. What is case hardening processes and explain any one in detail [07]

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OR

1. Differentiate between gray cast iron & spheroidal cast iron in terms of microstructure, properties, composition & applications [07]
2. Discuss the cathodic protection method of corrosion prevention for underground pipelines [07]

Q.4

1. With Neat Sketch Draw Iron-Carbon (Fe-C) Equilibrium Diagram & Explain briefly various micro constituents of the diagram. [07]

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2. What is phase diagram? Explain Lever rule based on phase diagram [07]

OR

1. Explain the effects on steel by alloying elements (i) Silicon (ii) Sulphur, (iii) Magnesium and (iv) Phosphorus. [07]
2. Describe with neat sketch how would a Jominy hardenability test on a steel sample is being conducted. [07]

Q.5

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1. Define unit cell. Explain with neat sketches the arrangement of atoms in B.C.C, F.C.C. and H.C.P. lattice. Prove that a F.C.C. structure is always more close packed than B.C.C. structure. [07]
2. Explain the process of flame hardening with neat sketch [07]

OR

1. Classify different types of cast iron. Why silicon is added to cast iron? Explain the effects of any four alloying elements on the properties of cast iron. [07]
2. [07]

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Total Marks: 70

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