MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
As a distance between precipitate particles increases, shear stress to bend dislocation decreases. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
A dislocation can avoid obstacles by a glide. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Line tension (T) is _____ |
| A. | b |
| B. | b<sup>1/2</sup> |
| C. | b<sup>2</sup> |
| D. | b<sup>3</sup> |
| Answer» D. b<sup>3</sup> | |
| 4. |
Elastic strain energy _____ with an increase in length. |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Increases then decrease |
| Answer» B. Decreases | |
| 5. |
What is the percentage contribution of elastic strain in the total energy of dislocation? |
| A. | 10% |
| B. | 30% |
| C. | 70% |
| D. | 90% |
| Answer» E. | |
| 6. |
What is the expression for the force required to bend the dislocation to radius R? |
| A. | Gb/2R |
| B. | Gb/R |
| C. | GbR |
| D. | Gb<sup>2</sup>/R |
| Answer» B. Gb/R | |
| 7. |
The stability of dislocations ____ with an increase in the Burgers vector. |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Increases then decrease |
| Answer» C. Remains constant | |
| 8. |
Elastic energy of a dislocation is _____ the Burgers vector. |
| A. | Directly proportional to |
| B. | Proportional to the square of |
| C. | Not dependent on |
| D. | Proportional to the square root of |
| Answer» C. Not dependent on | |
| 9. |
Elastic strain energy of screw dislocation is ____ of that of edge dislocation for unit length? |
| A. | Higher |
| B. | Lesser |
| C. | Equal |
| D. | Half |
| Answer» C. Equal | |
| 10. |
What is the ratio of elastic strain energy per unit length of an edge dislocation and screw dislocation? |
| A. | 1:1 |
| B. | 1:2 |
| C. | 2:3 |
| D. | 3:2 |
| Answer» C. 2:3 | |
| 11. |
Which statement is true regarding screw and edge dislocation? |
| A. | Screw and edge dislocation both show non-symmetry |
| B. | Screw and edge dislocation both are equally symmetric |
| C. | Symmetry of edge dislocation is greater than screw dislocation |
| D. | Symmetry of screw dislocation is greater than edge dislocation |
| Answer» E. | |
| 12. |
What is the order of core energy? |
| A. | 0.5 1.5 eV |
| B. | 0.1 1.0 eV |
| C. | 2.0 4.0 eV |
| D. | 3.0 10 eV |
| Answer» B. 0.1 1.0 eV | |