MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
What will be strength, if Burgers vector of dislocation is a [x y z]? |
| A. | a2[x2 + y2 + z2] |
| B. | a[x2 + y2 + z2] |
| C. | a[x2 + y2 + z2]1/2 |
| D. | a[x2 + y2 + z2]2 |
| Answer» D. a[x2 + y2 + z2]2 | |
| 2. |
a/6[1 2 1] + a/6[1 2 1] → _______ |
| A. | a/3[1 0 1] |
| B. | a/6[1 0 1] |
| C. | a/3[1 0 1] |
| D. | a/6[1 0 1] |
| Answer» B. a/6[1 0 1] | |
| 3. |
The reaction a/6[1 2 1] + a/6[2 1 1] → a/2[1 1 0] is ________ |
| A. | Favourable energetically |
| B. | Favourable vectorially |
| C. | Favourable vectorially and energetically |
| D. | Not favourable vectorially and energetically |
| Answer» C. Favourable vectorially and energetically | |
| 4. |
The reaction a/2[1 1 0] → a/6[1 2 1] + a/6[2 1 1] is _______ |
| A. | Favourable energetically |
| B. | Favourable vectorially |
| C. | Favourable vectorially and energetically |
| D. | Not favourable vectorially and energetically |
| Answer» D. Not favourable vectorially and energetically | |
| 5. |
What is the strength of the Burgers vector for dislocations in BCC structure? |
| A. | a/√2 |
| B. | a/3 |
| C. | a√3/2 |
| D. | 3a/√2 |
| Answer» D. 3a/√2 | |
| 6. |
THE_REACTION_A/2[
|
| A. | Favourable energetically |
| B. | Favourable vectorially |
| C. | Favourable vectorially and energetically |
| D. | Not favourable vectorially and energetically |
| Answer» D. Not favourable vectorially and energetically | |
| 7. |
a/6[1 2 1] + a/6[1 2 1] ‚Üí _______$# |
| A. | a/3[1 0 1] |
| B. | a/6[1 0 1] |
| C. | a/3[<span style="text-decoration:overline;">1</span> 0 1] |
| D. | a/6[<span style="text-decoration:overline;">1</span> 0 1] |
| Answer» B. a/6[1 0 1] | |
| 8. |
The_reaction_a/6[
|
| A. | Favourable energetically |
| B. | Favourable vectorially |
| C. | Favourable vectorially and energetically |
| D. | Not favourable vectorially and energetically |
| Answer» C. Favourable vectorially and energetically | |
| 9. |
What_will_be_strength,_if_Burgers_vector_of_dislocation_is_a_[x_y_z]? |
| A. | a<sup>2</sup>[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>] |
| B. | a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>] |
| C. | a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>1/2</sup> |
| D. | a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>2</sup> |
| Answer» D. a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>2</sup> | |
| 10. |
What is the strength of the Burgers vector for dislocations in FCC structure? |
| A. | a/‚àö2 |
| B. | a‚àö3/2 |
| C. | 3a/‚àö2 |
| D. | a/2 |
| Answer» B. a‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ3/2 | |
| 11. |
Extended screw dislocations can move only on the plane with stacking fault. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
SFE of copper increases with the amount of zinc. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The pair of partial dislocations along with stacking fault region is called ______ dislocation. |
| A. | Frank partial |
| B. | Lomer-Cottrell |
| C. | Extended |
| D. | Unit |
| Answer» D. Unit | |
| 14. |
The energy released on dissociation of perfect dislocation into partial dislocations is _____ |
| A. | Stacking fault energy |
| B. | Dislocation energy |
| C. | Elastic energy |
| D. | Core energy |
| Answer» B. Dislocation energy | |
| 15. |
What is not a type of partial dislocation? |
| A. | Frank |
| B. | Shockley |
| C. | Stair rod |
| D. | Unit |
| Answer» E. | |
| 16. |
A dislocation with its Burgers vector equals one lattice spacing is called ______ dislocation. |
| A. | Unit |
| B. | Partial |
| C. | Imperfect |
| D. | Frank |
| Answer» B. Partial | |