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Engineering Materials & Metallurgy Practice Test: Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation
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This quiz covers: Crystal defects, corrosion and its types, oxidation and oxidation control, fracture types, fracture toughness and protection against fracture.
 

Engineering Materials & Metallurgy Practice Test: Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation
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25 Questions

1. Which of the following can be applied to prevent ductile fracture?
2. What are two-dimensional defects?
3. What is the free energy of formation value for Al2O3?
4. Which of the following is not applicable for prevention of fatigue fracture?
5. Which defect does the following figure depict?
Schottky defect is closely related to vacancy defects where simply an ion is missing
6. Griffith theory is applicable for ______ materials.
7. __________ can be added to steels to prevent intergranular failure.
8. The phenomenon where the density of metal is exceptionally low due to increasing potential is known as _______
9. _______ occurs when a foreign substance replaces an atom in a crystal.
10. How can caustic embrittlement be avoided?
11. Which defect does the following diagram represent?
Interstitial defects occur when an atom occupies an empty position in a crystal lattice
12. Season-cracking can be prevented by cold-working of brass at _________
13. What is the Piling-Bedworth ratio of MgO?
14. What is the SI unit of fracture toughness?
15. Which of the following is a point defect in crystals?
16. What is the fracture toughness of aluminum alloy?
17. In screw dislocation, the Burger’s vector lies _________ to the dislocation line.
18. Generation of dislocations can be identified using _______
19. Which of these is not a way to prevent intergranular corrosion?
20. What is the surface energy of a crack?
21. Polymer materials become brittle below ________
22. Which of these materials is not added to iron for improving its oxidation resistance?
23. A galvanic cell formed due to residual stresses is known as ________
24. The potential of metal in nonstandard conditions is given by _________
25. A disturbance in a region between two ideal parts of a crystal is known as ________

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