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Interview Questions on Material Science and Engineering

Interview Questions on Material Science and Engineering

You are viewing first 10 short questions and answers that are usually asked during an interview on material science and engineering topic.
1. What is the difference between the isotropic and anisotropic materials ?
2. What are orthotropic materials ?
3. A plain carbon steel has Brinell Hardness Number (BHN) of 180. What are the values of Rc, VHN and ultimate strength ?
4. What properties are needed to be considered for application calling for following requirements:
i) rigidity
ii) Strength of no plastic deformation under static load
iii) Strength to withstand overload without fracture
5. Explain the effects of alloying chromium and nickel in stainless steel.
6. Mention two types of dislocations.
7. What are the principal constituents of brass ?
8. What is Curie point ?
9. Specific strength of materials is very high when they are in fibre size but lower when they are in bar form - Why ?
10. What is the percentage of carbon in cast iron ?
Questions and answers from 11 to 20 on Material Science and Engineering.
11. Which element is added in steel to increase resistance to Corrosion ?
12. Whether individual components in composite materials retain their characteristics or not
13. An elastomer is a polymer when its percentage elongation rate is _____ ?
14. If percentage elongation of material is more than 200%, it is called as .... ?
15. Why is it that the maximum value which the residual stress can reach is the elastic limit of the material ?
16. Why fatigue strength decreases as size of a part increases beyond around 10mm?
17. Distinguish between creep and fatigue.
18. While normal carburizing and nitriding surface treatments increase fatigue strength, excessive treatment may decrease the fatigue strength. Why ?
19. List at least two factors that promote the transition from ductile to brittle fracture.
20. Which theories of failure are used for
(a) ductile materials
(b) brittle materials ?

Interview Questions on Material Science and Engineering

Questions and answers from 21 to 30 on Material Science and Engineering.
21. What is the common element between the brass and bronze metal alloys ?
22. What does the alloy designation FG 250 indicate?
23. Define Ceramic?
24. Give one example of metal classified as per structure as BCC, FCC, HCP and CCP.
25. What is the name of solid solution of carbon in alpha-iron and delta iron ?
26. Explain the difference between pearlite and cementite ?
27. Give one example each of the following proportion of materials – dimensional, physical, technological and mechanical.
28. For which parts the Wahl factor and Lewis factor is used ?
29. How oxygen gas can be removed from steel during melting? What are fully killed steels?
30. Hydrogen cannot be removed easily from molten steel. What harm hydrogen has on property of steel ?

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