MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
Which statement is false regarding dislocation? |
| A. | Dislocation can move if applied shear stress is greater than lattice frictional stress |
| B. | Pure screw dislocations cannot climb |
| C. | Critical normal stress is much greater than the theoretical |
| D. | Peierls and Nabbaro stress is much greater than the theoretical shear stress of a perfect lattice |
| Answer» E. | |
| 2. |
Pure screw dislocation can climb. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The positive climb involves diffusion of _____ while negative climb involves diffusion of _____ |
| A. | Vacancies, vacancies |
| B. | Vacancies, interstitials |
| C. | Interstitials, vacancies |
| D. | Interstitials, interstitials |
| Answer» C. Interstitials, vacancies | |
| 4. |
____ is important in ductile metals for plastic deformation. |
| A. | Climb |
| B. | Glide |
| C. | Cross slip |
| D. | Twinning |
| Answer» D. Twinning | |
| 5. |
Resolved shear stress is given as = ______ |
| A. | sin sin |
| B. | sin cos |
| C. | cos sin |
| D. | cos cos |
| Answer» E. | |