MCQOPTIONS
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MCQOPTIONS
This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the resolved shear stress, when dislocation density in metal is equal to 1012m-2? Given that shear stress needed in the absence of dislocation is 500MPa. Numerical constant is 0.3 and shear modulus is 80GPa, burger vector is 1 nm. |
| A. | 500MPa |
| B. | 550MPa |
| C. | 600 MPa |
| D. | 524 MPa |
| Answer» E. | |
| 2. |
A zinc crystal is strained to point A, unloaded, and then reloaded in the direction opposite to the original slip direction: |
| A. | What is the reason for the drop in shear stress when loaded in the opposite direction? |
| B. | Back stress |
| C. | Strain hardening |
| D. | Increase in the number of slip system |
| E. | Slip plane reorientation |
| Answer» B. Back stress | |