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. |
The screw dislocation in which the atomic displacement occurs in the forward direction is a counterclockwise dislocation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Below the edge of an extra half plane of edge dislocation, bonds are broken. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
An edge dislocation can be characterized as _________ |
| A. | The angle between the dislocation line and its Burgers vector is 0° |
| B. | The angle between the dislocation line and its Burgers vector is 45° |
| C. | The angle between the dislocation line and its Burgers vector is 90° |
| D. | The angle between the dislocation line and its Burgers vector is 120° |
| Answer» D. The angle between the dislocation line and its Burgers vector is 120° | |
| 4. |
What is the angle between applied stress and mixed dislocation line? |
| A. | 0° |
| B. | <90° |
| C. | 90° |
| D. | >90° |
| Answer» C. 90° | |
| 5. |
A dislocation can’t terminate _____ |
| A. | Within crystal |
| B. | In free surface |
| C. | Ingrain boundary |
| D. | With another dislocation |
| Answer» B. In free surface | |
| 6. |
WHAT_IS_THE_ANGLE_BETWEEN_APPLIED_STRESS_AND_MIXED_DISLOCATION_LINE??$ |
| A. | 0° |
| B. | <90° |
| C. | 90° |
| D. | >90° |
| Answer» C. 90¬¨¬®‚Äö√†√ª | |
| 7. |
Below the edge of an extra half plane of edge dislocation, bonds are broken.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
An_edge_dislocation_can_be_characterized_as__________$ |
| A. | The angle between the dislocation line and its Burgers vector is 0° |
| B. | The angle between the dislocation line and its Burgers vector is 45° |
| C. | The angle between the dislocation line and its Burgers vector is 90° |
| D. | The angle between the dislocation line and its Burgers vector is 120° |
| Answer» D. The angle between the dislocation line and its Burgers vector is 120¬¨¬®‚Äö√†√ª | |
| 9. |
The_screw_dislocation_in_which_the_atomic_displacement_occurs_in_the_forward_direction_is_a_counterclockwise_dislocation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
A dislocation can’t terminate ____?# |
| A. | Within crystal |
| B. | In free surface |
| C. | Ingrain boundary |
| D. | With another dislocation |
| Answer» B. In free surface | |
| 11. |
Screw dislocation _____ cross slip and _____ climb. |
| A. | Can, can |
| B. | Can, cannot |
| C. | Cannot, can |
| D. | Cannot, cannot |
| Answer» C. Cannot, can | |
| 12. |
Edge dislocation ______ cross slip and _____ climb. |
| A. | Can, can |
| B. | Can, cannot |
| C. | Cannot, can |
| D. | Cannot, cannot |
| Answer» D. Cannot, cannot | |
| 13. |
Dislocations are classified in ____ types based on geometry. |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» B. 4 | |
| 14. |
Screw dislocation line moves ______ to applied stress. |
| A. | Parallel |
| B. | Perpendicular |
| C. | At angle < 90° |
| D. | At angle > 90° |
| Answer» C. At angle < 90¬¨¬®‚Äö√†√ª | |
| 15. |
Which term is used for the line which lies between the slipped and unslipped regions? |
| A. | Dislocation line |
| B. | Slip line |
| C. | Free surface |
| D. | Grain boundary |
| Answer» B. Slip line | |
| 16. |
Dislocations during solidification produces due to ______ |
| A. | Impurity atoms |
| B. | Voids |
| C. | Cooling |
| D. | Metal atoms |
| Answer» B. Voids | |
| 17. |
Dislocations are generated mostly when ______ takes place. |
| A. | Slip |
| B. | Twinning |
| C. | Annealing |
| D. | Heating |
| Answer» B. Twinning | |