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Material Science Practice Test: Failure
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Material Failure topics include: Failure fundamentals, ductile and brittle fracture, fracture mechanics, fatigue, fracture tests, creep and high temperature alloys. Material failure is a technical term in engineering that describes when a material used in a design no longer performs its intended purpose. It can be caused by a number of factors, including: Stress concentration: When the load on a material is unevenly distributed Corrosion: The gradual degradation of a material's properties due to chemical reactions with its environment Incorrect material selection  Material failure can be... Show more
Material Science Practice Test: Failure
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25 Questions

1. After which point is necking observed?
2. Which of the following is not notch sensitive?
3. Corrosion can increase fatigue life.
4. The S-N curve for mild steel never becomes a horizontal line.
5. Which of the following does not enhance the creep resistance of an alloy?
6. Which of the following is true?
7. Charpy test is not a type of impact test.
8. In ductile fracture, at what angle to the tensile axis does the crack propagate outwardly to the surface of the material?
9. Which of the following is not a zone of fatigue fracture?
10. What can be height of an extrusion or an intrusion which is responsible for crack initiation in case of fatigue (in cm?
11. At what temperature is steel ductile?
12. Which of the following cannot be a reason for ductile failure?
13. What amount of actual stress would be needed to fracture bulk glass?
14. According to Griffith if f is stress at fracture and a is flaw length then which of the following is true?
15. Creep depends on temperature.
16. What is the dimension of material used in case of Izod test?
17. Below which point does brittle fracture occur?
18. Material subjected to only tensile force even during necking.
19. Which of the following stage is also known as the unstable stage?
20. Improper heat treatment can cause mechanical failure.
21. Which of the following is false?
22. Cleavage planes are a term associated with ductile fracture.
23. The tendency of brittle fracture increases with:
24. What is the nature of the curve of a viscous creep?
25. Surface energy of the specimen increases when the crack lengthens.

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