Veer Narmad South Gujarat University 2010-3rd Sem B.E Material Science & Metallurgy - 2 ( ) ( Mech.) - Question Paper
RN-8121
B. E. - II (Sem. Ill) (Mechanical) Examination
May/June - 2010
Time : 3 Hours]
[Total Marks : 100
Instructions :
Seat No.:
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Fillup strictly the details of signs on your answer book.
Name of the Examination :
B. E. - 2 (Sem. 3) (Mechanical)
Name of the Subject:
Material Science & Metallurgy
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-Subject Code No. |
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-Section No. (1,2,.....) |
Student's Signature
1&2
(2) Attempt all questions.
(3) Figures to the right indicate full marks.
(4) Draw neat sketch wherever necessary.
(5) Answer to the two sections should be written in two separate answer books.
1 Attempt any four from following : 20
(a) Define the following terms :
(i) Elasticity
(ii) Tensile strength
(iii) Fatigue
(iv) Hardness
(v) Impact strength.
(b) Define point defect. Explain any one.
(c) Explain B.C.C. structure and calculate no. of atom per unit cell, atomic radius, atomic packing factor for it.
(d) Explain Lever phase Rule.
(e) Explain specimen preparation for microscopic examination.
RN-8121] 1 [Contd...
(i) Explain plain carbon steel in detail with its classification.
(ii) Draw T-T-T diagram for 0.8% carbon steel and explain its importance to the heat treatment processes given to the steel.
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7
OR
(ii) Explain Peritectic Reaction with neat sketch.
3 Answer any three from following :
15
(i) Explain spark test
(ii) Explain Eggertz method for carbon estimation in steel.
(iii) Explain Normalising process
(iv) Give criteria for selection of materials for engineering applications.
4 (a) Answer any six :
12
(i) What is Martensite?
(ii) What is composite materials?
(iii) What is diffusion?
(iv) What is curie point?
(v) What is corrosion?
(vi) List of refractory materials.
(vii) Difference between hardness and hardenability.
(viii) Write down the composition (chemical elements) of gun metal.
(b) Answer the following : 12
(i) Explain joining end quech test and Hardenability bands.
(ii) Limitations of power metallurgy.
5 (i) Explain wet corrosion. 7
(ii) Draw and label Fe-Fe3C diagram and explain 8 various phases present in.
6 (i) Write down the concept, advantages, disadvantages 6
and application of hot pressing in powder metallurgy.
(i) Explain different methods of producing metal powder. 6
(ii) Short note : Dye penetrant test. 5
RN-8121] 3 [ 300 ]
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Attachment: |
| Earning: Approval pending. |
