written 5.6 years ago by
yashbeer
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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)