MCQOPTIONS
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MCQOPTIONS
This section includes 18 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. |
Increase in yield strength increases fracture toughness of a material. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The larger flaws reduce the allowable stress. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Largest size flaw can be determined using __________ |
| A. | Brinell test |
| B. | NDT |
| C. | Leeb test |
| D. | Shore test |
| Answer» C. Leeb test | |
| 4. |
What is the fracture toughness of 4340 steel in MPa√m? |
| A. | 50 |
| B. | 88 |
| C. | 46 |
| D. | 99 |
| Answer» D. 99 | |
| 5. |
What is the fracture toughness of alumina in MPa√m? |
| A. | 1.26 |
| B. | 1.76 |
| C. | 1.86 |
| D. | 1.98 |
| Answer» C. 1.86 | |
| 6. |
Which of the following mode is tearing mode? |
| A. | Mode I |
| B. | Mode II |
| C. | Mode III |
| D. | Mode IV |
| Answer» D. Mode IV | |
| 7. |
Which of the following mode is the sliding mode? |
| A. | Mode I |
| B. | Mode II |
| C. | Mode III |
| D. | Mode IV |
| Answer» C. Mode III | |
| 8. |
LARGEST_SIZE_FLAW_CAN_BE_DETERMINED_USING___________?$ |
| A. | Brinell test |
| B. | NDT |
| C. | Leeb test |
| D. | Shore test |
| Answer» C. Leeb test | |
| 9. |
Increase in yield strength increases fracture toughness of a material.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
The larger flaws reduce the allowable stress.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
What is the unit of fracture toughness? |
| A. | MPa |
| B. | MPa‚àöm |
| C. | MPam |
| D. | MPam<sup>2</sup> |
| Answer» C. MPam | |
| 12. |
All the crack tip stresses are __________ to K. |
| A. | Equal |
| B. | Greater |
| C. | Lesser |
| D. | Proportional |
| Answer» E. | |
| 13. |
Which type of loading is most common and important for structural components? |
| A. | Mode I |
| B. | Mode II |
| C. | Mode III |
| D. | Mode IV |
| Answer» B. Mode II | |
| 14. |
___________ metals fracture toughness is unaffected from temperature increase. |
| A. | SC |
| B. | BCC |
| C. | FCC |
| D. | HCP |
| Answer» D. HCP | |
| 15. |
Which of the following has the highest fracture toughness? |
| A. | Marageing steel |
| B. | Alumina |
| C. | Silicon nitride |
| D. | PSZ |
| Answer» B. Alumina | |
| 16. |
What is the fracture toughness of alumina in MPa‚àöm?$ |
| A. | 1.26 |
| B. | 1.76 |
| C. | 1.86 |
| D. | 1.98 |
| Answer» C. 1.86 | |
| 17. |
Which mode is tearing mode? |
| A. | Mode I |
| B. | Mode II |
| C. | Mode III |
| D. | Mode IV |
| Answer» D. Mode IV | |
| 18. |
Which mode is the sliding mode? |
| A. | Mode I |
| B. | Mode II |
| C. | Mode III |
| D. | Mode IV |
| Answer» C. Mode III | |