MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The equicohesive temperature defines the limit of temperature above which __________ |
| A. | the grain interior is stronger than grain boundary |
| B. | the grain boundary is stronger than grain interior |
| C. | recrystallization takes place |
| D. | dislocation become mobile |
| Answer» B. the grain boundary is stronger than grain interior | |
| 2. |
The Ashby model does not define ________________ |
| A. | statistically stored dislocation |
| B. | geometrically stored dislocation |
| C. | deformation of polycrystal |
| D. | deformation of single crystal |
| Answer» E. | |
| 3. |
Hexagonal closed packed materials is generally not ductile. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The strain hardening will be most effective in _________ |
| A. | fine grain size metal |
| B. | coarse grain size metal |
| C. | fine grain size metal with solute atom |
| D. | coarse grain size metal with solute atom |
| Answer» D. coarse grain size metal with solute atom | |
| 5. |
High angle grain boundary will have ________________ and low angle grain boundary will have _______________ |
| A. | higher surface energy, low surface energy |
| B. | low surface energy, Higher surface energy |
| C. | higher surface energy, Higher surface energy |
| D. | low surface energy, Low surface energy |
| Answer» B. low surface energy, Higher surface energy | |
| 6. |
The grain boundary is made of a regular array of edge dislocation at define spacing. In the case of low angle grain boundary, the distance between dislocation array will be small, and for high angle grain boundaries, it will be large. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
For low angle grain boundary, the misfit angle is in the range of __________ |
| A. | 1° |
| B. | 10° |
| C. | 90° |
| D. | 0.001° |
| Answer» B. 10° | |
| 8. |
If the mobility of dislocation is high, the strength of crystal will be ___________ |
| A. | low |
| B. | high |
| C. | not affected |
| D. | cannot predict |
| Answer» B. high | |