Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) Mechanical Engineering 2020 December 4th Sem 77549 Materials Engineering Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (Mechanical Engineering) (20 18 Batch) (Sem.?4)
MATERI ALS ENGINEERING
Subject Code : BTME-404-18
M.Code : 77549
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1.
Differentiate between atomic number and atomic mass.
2.
What is Metallic Bond? List their characteristic properties.
3.
Using suitable sketch, explain the difference between FCC and BCC unit cells.
4.
Explain Theoretical Yield Strength.
5.
What do you mean by steady-state diffusion process?
6.
Define Phase.
7.
Discuss the applications of lever rule.
8.
What information can be derived from TTT diagram?
9.
What is pearlite?
10. What is stainless steel?
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SECTION-B
11. Explain the difference between Edge and Screw dislocations.
12. Explain the difference between slip and twinning.
13. What useful information can be obtained from phase diagrams? Draw and label phase
diagram for binary isomorphous system.
14. Using Fe-C equilibrium diagram, explain the difference between Full and Partial annealing
processes.
15. Why hardening is always followed by tempering treatment? Explain the various stages of
tempering.
SECTION-C
16. What are various surface hardening treatments? Write note on carburizing and flame
hardening treatments.
17. Discuss the classification of alloying elements in steels. Explain the effects of adding Si, W
and Al on the properties of steels.
18. Write brief notes on the followings :
a. Hardeneability of steel.
b. Factors influencing diffusion
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021