STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
Show that the atomic packing factor for BCC crystal is 0.68.
4 M
1 (b)
Explain any two point defects with the help of diagram.
4 M
1 (c)
A continuous and aligned glass fiber reinforced composite of 40 volume % of glass fibers having a modulus of elasticity of 69 Gpa and 60 volume % of a polyster resin that, when hardened, displays a modulus of 3.4 GPa. If the cross-sectional area is 250 mm2 and a stress of 50 Mpa is applied in this longitudinal direction, compute the magnitude of the load carried by each of the fiber and matrix phases.
4 M
2 (a)
Derive linear density expression of FCC [100] and [111] directions in terms of the atomic radius R.
4 M
2 (b)
Explain the following processing methods of ceramics:
i) Cold isostatic pressing
ii) Slip casting.
i) Cold isostatic pressing
ii) Slip casting.
6 M
2 (c)
Explain work hardening on the basis of dislocations.
2 M
Solve any one question from Q3 and Q4
3 (a)
A cylindrical specimen of steel having an original diameter 12.8 mm is tensile to fracture and found to have an engineering fracture strength of 460 Mpa if its cross-sectional diameter of fracture is 10.7 mm, determine:
i) Ductility in terms of percent reduction in area.
ii) True stress at fracture.
i) Ductility in terms of percent reduction in area.
ii) True stress at fracture.
6 M
3 (b)
What is fatigue? Draw S-N curve for Mild Steel and Aluminium and explain Endurance limit.
6 M
4 (a)
Explain the methods of magnetization and demagnetization of component during magnetic particle inspection. Why the demagnetization is necessary after testing?
6 M
4 (b)
Differentiate between dye penetrant inspection and fluorescent penetrant inspection.
4 M
4 (c)
Explain Moh's hardness scale.
2 M
Solve any one question from Q5 and Q6
5 (a)
Discuss about particle size, shape and size distribution and its effect on the properties of the final sintered compact.
6 M
5 (b)
Using flow sheet explain manufacturing of cemented carbide tools by powder metallurgy.
7 M
6 (a)
Discuss production of Iron powder by reduction process.
4 M
6 (b)
What is compaction? List the defects of compact and their remedies.
5 M
6 (c)
What is sintering? Explain the stages of sintering.
4 M
Solve any one question from Q7 and Q8
7 (a)
Define nano-material and give application. Write a note on carbon nano-tubes.
6 M
7 (b)
Give the classification of bio-material. Describe properties and application of Nickel alloy as bio-material.
7 M
8 (a)
Explain the use of Ni base and Cobalt base alloy for high temperature application.
4 M
8 (b)
Explain the properties of superconductors. Briefly explain any two applications of superconductors.
6 M
8 (c)
Discuss the effect of Cryogenic heat treatment on steel alloy.
3 M
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