MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not a theory of fatigue? |
| A. | Orowan theory |
| B. | Griffith’s theory |
| C. | Fatigue limit theory |
| D. | Wood’s theory |
| Answer» C. Fatigue limit theory | |
| 2. |
In Wohler’s Fatigue test, how many cycles can cast iron to be subjected to before failure? |
| A. | 10,000,000 |
| B. | 100,000,000 |
| C. | 5,000,000 |
| D. | 1,000,000 |
| Answer» B. 100,000,000 | |
| 3. |
The S-N curve for mild steel never becomes a horizontal line. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
WHICH_OF_THE_FOLLOWING_IS_NOT_A_THEORY_OF_FATIGUE??$ |
| A. | Orowan theory |
| B. | Griffith’s theory |
| C. | Fatigue limit theory |
| D. | Wood’s theory |
| Answer» C. Fatigue limit theory | |
| 5. |
IN_WOHLER‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_FATIGUE_TEST,_HOW_MANY_CYCLES_CAN_CAST_IRON_TO_BE_SUBJECTED_TO_BEFORE_FAILURE??$# |
| A. | 10,000,000 |
| B. | 100,000,000 |
| C. | 5,000,000 |
| D. | 1,000,000 |
| Answer» B. 100,000,000 | |
| 6. |
The S-N curve for mild steel never becomes a horizontal line? |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the speed of the motor in rotating beam fatigue test? |
| A. | 200 rpm |
| B. | 500 rpm |
| C. | 1000 rpm |
| D. | 1500 rpm |
| Answer» D. 1500 rpm | |
| 8. |
Corrosion can increase fatigue life. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Which of the following is not a zone of fatigue fracture? |
| A. | Zone of crack nucleation |
| B. | Fatigue zone |
| C. | Elastic zone |
| D. | Final fracture |
| Answer» D. Final fracture | |
| 10. |
Below which point does fatigue occur? |
| A. | Ultimate strength |
| B. | Fracture point |
| C. | Elastic limit |
| D. | Yield point |
| Answer» B. Fracture point | |
| 11. |
Which of the following is the most common type of failure in industry? |
| A. | Brittle fracture |
| B. | Ductile fracture |
| C. | Creep |
| D. | Fatigue |
| Answer» E. | |
| 12. |
What can be height of an extrusion or an intrusion which is responsible for crack initiation in case of fatigue (in cm? |
| A. | 2*10<sup>-6</sup> |
| B. | 2*10<sup>-8</sup> |
| C. | 10<sup>-5</sup> |
| D. | 10<sup>-8</sup> |
| Answer» B. 2*10<sup>-8</sup> | |
| 13. |
Which of the following is failure of material due to cyclic stress? |
| A. | Brittle fracture |
| B. | Ductile fracture |
| C. | Creep |
| D. | Fatigue |
| Answer» E. | |