Question Paper: Material Technology Question Paper - Jun 17 - Mechanical Engineering (Semester 3) - Mumbai University (MU)
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Material Technology - Jun 17 (Old Syllabus 2012)

Mechanical Engineering (Semester 3)

Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question No. 1 is compulsory
(2) Attempt any three questions from remaining five questions
(3) Draw neat diagrams wherever necessary

1. Write notes on (any four):

  • (a) Effect of Alloying Elements on Phase Transformation 323

  • (b) Critical Resolved Shear Stress 280

  • (c) Creep Test 296

  • (d) What are Composites? Give classification of Composites. 332 329

  • (e) Importance of Iron as Engineering Material 310

(5X4 = 20 marks)

2(a) Draw and explain Isomorphous and Eutectoid Phase diagram.
(8 marks) 301

2(b) What is deformation? Explain the slip mode of deformation.
(6 marks) 282

2(c) Define Fatigue. Draw S-N Curve and explain its interpretation.
(6 marks) 292

3(a) Draw Iron and Iron Carbide $(F_e - {F_e}_3C)$ diagram and explain the phases existing in it.
(12 marks) 303

3(b) Explain Flame Hardening and Induction Hardening.
(8 marks) 313

4(a) Draw and explain construction of Time Temperature Transformation (TTT) diagram of 0.8% C alloy.
(10 marks) 305

4(b) Derive an expression for Griffith theory for Brittle Fracture.
(10 marks) 291

5(a) Give classification of Stainless Steel.
(5 marks) 324

5(b) Differentiate in between Edge Dislocation and Screw Dislocation.
(5 marks) 284

5(c) What is Case Hardening? Explain Carburising in detail.
(10 marks) 316 317

6. Write short notes on (any four)

  • (a) Types of Cast Iron 302

  • (b) Hardenability Test 307

  • (c) Austempering 311

  • (d) Methods used for Nanomaterials Synthesis 331

  • (e) Normalising 319

(5X4 = 20 marks)

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