MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Forest dislocations make deformation easy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
During the jog movement, vacancy formation is faster than interstitial atom formation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is energy required for forming a vacancy at a jog in fcc metal? |
| A. | 0.7 eV |
| B. | 1.4 eV |
| C. | 2.7 eV |
| D. | 4.8 eV |
| Answer» E. | |
| 4. |
Screw dislocations with jogs are __________ mobile than edge dislocations. Screw dislocations without jog move __________ from one plane to another than edge dislocation. |
| A. | more, easily |
| B. | more, hardly |
| C. | less, easily |
| D. | less, hardly |
| Answer» D. less, hardly | |
| 5. |
Which of the following jog is a type of jog that has the ability to glide? |
| A. | glissile |
| B. | sessile |
| C. | kink |
| D. | partial |
| Answer» B. sessile | |
| 6. |
SCREW_DISLOCATIONS_WITH_JOGS_ARE____________MOBILE_THAN_EDGE_DISLOCATIONS._SCREW_DISLOCATIONS_WITHOUT_JOG_MOVE____________FROM_ONE_PLANE_TO_ANOTHER_THAN_EDGE_DISLOCATION.?$ |
| A. | more, easily |
| B. | more, hardly |
| C. | less, easily |
| D. | less, hardly |
| Answer» D. less, hardly | |
| 7. |
During the jog movement, vacancy formation is faster than interstitial atom formation.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
What_is_energy_required_for_forming_a_vacancy_at_a_jog_in_fcc_metal?$ |
| A. | 0.7 eV |
| B. | 1.4 eV |
| C. | 2.7 eV |
| D. | 4.8 eV |
| Answer» E. | |
| 9. |
Forest_dislocations_make_deformation_easy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
What is step height of super jog? |
| A. | 1-2b |
| B. | 1-4b |
| C. | 5-30b |
| D. | more than 30b |
| Answer» D. more than 30b | |
| 11. |
What is the energy of a jog of length b2 and Burgers vector b1? |
| A. | 0.2Gb<sub>1</sub><sup>2</sup>b<sub>2</sub> |
| B. | 0.5Gb<sub>1</sub>b<sup>2</sup>b<sub>2</sub> |
| C. | Gb<sub>1</sub>b<sup>2</sup>b<sub>2</sub> |
| D. | Gb<sub>1</sub><sup>2</sup>b<sub>2</sub> |
| Answer» B. 0.5Gb<sub>1</sub>b<sup>2</sup>b<sub>2</sub> | |
| 12. |
__________ in dislocations are unstable. |
| A. | Jogs |
| B. | Kinks |
| C. | Vacancies |
| D. | Interstitials |
| Answer» C. Vacancies | |
| 13. |
A __________ is a sharp break in the dislocation line which remains in the slip plane. |
| A. | jog |
| B. | kink |
| C. | dislocation loop |
| D. | frank-Read source |
| Answer» C. dislocation loop | |
| 14. |
Which is the most important type of intersection from viewpoint of plastic deformation? |
| A. | The intersection of edge dislocations having b perpendicular to each other |
| B. | The intersection of edge dislocations having b parallel to each other |
| C. | The intersection of edge dislocation with a screw dislocation |
| D. | The intersection of screw dislocations |
| Answer» E. | |
| 15. |
The movement of jogged dislocations is ___________ than dislocations having no jogs. |
| A. | easier |
| B. | more difficult |
| C. | equally difficult |
| D. | easy and difficult |
| Answer» C. equally difficult | |
| 16. |
Formation of jog __________ energy related to dislocations. |
| A. | increases |
| B. | decreases |
| C. | doesn’t affect |
| D. | can Increase or decrease |
| Answer» B. decreases | |
| 17. |
Jog, which is able to glide is called __________ jog. |
| A. | glissile |
| B. | sessile |
| C. | kink |
| D. | partial |
| Answer» B. sessile | |