MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Griffith theory is applicable for ______ materials. |
| A. | All brittle |
| B. | Perfect brittle |
| C. | All ductile |
| D. | Perfect ductile |
| Answer» C. All ductile | |
| 2. |
Griffith theory is applicable for ______ material? |
| A. | All brittle |
| B. | Perfect brittle |
| C. | All ductile |
| D. | Perfect ductile |
| Answer» C. All ductile | |
| 3. |
What is the surface energy of a crack? |
| A. | ϒ |
| B. | 2 ϒ c |
| C. | 4 ϒ c |
| D. | 12 ϒ c |
| Answer» D. 12 ‚âà√¨‚àö‚↠c | |
| 4. |
In crystalline materials, fracture occurs normal to crystallographic planes called ___________ |
| A. | Fracture point |
| B. | Cleavage plane |
| C. | Brittle plane |
| D. | Crystallographic point |
| Answer» C. Brittle plane | |
| 5. |
What is the breaking stress of brittle materials? |
| A. | Y/6 |
| B. | Y/10 |
| C. | Y/100 |
| D. | Y/1000 |
| Answer» E. | |
| 6. |
The tensile strength required to break interatomic bonds across two adjacent planes is ________ |
| A. | Y |
| B. | Y/2 |
| C. | Y/4 |
| D. | Y/6 |
| Answer» E. | |
| 7. |
What is the SI unit of fracture toughness? |
| A. | N m<sup>-2</sup> |
| B. | J m<sup>-2</sup> |
| C. | J m<sup>-1</sup> |
| D. | N m<sup>-1</sup> |
| Answer» C. J m<sup>-1</sup> | |
| 8. |
How is fracture stress defined? |
| A. | MN m<sup>-2</sup> |
| B. | J m<sup>-2</sup> |
| C. | mm |
| D. | GN m<sup>-1</sup> |
| Answer» B. J m<sup>-2</sup> | |