MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following material shows a strong coaxing effect? |
| A. | Brass |
| B. | Aluminum |
| C. | Low-alloy steel |
| D. | Mild steel |
| Answer» E. | |
| 2. |
If the sample is tested for a large number of cycles below its fatigue limit and the stress is gradually increased above the fatigue limit, the true fatigue limit of material will _______ |
| A. | improve |
| B. | worsen |
| C. | no effect |
| D. | cannot say |
| Answer» B. worsen | |
| 3. |
The under-stressed sample have ____________ fatigue life than a virgin sample. |
| A. | better |
| B. | poorer |
| C. | same |
| D. | cannot say |
| Answer» B. poorer | |
| 4. |
The cycle ratio is defined as _____________ |
| A. | the ratio of the cycles of overstressing at the prestress to the virgin fatigue life at this same stress |
| B. | the ratio of virgin fatigue life to cycles of overstressing at this same stress |
| C. | the ratio of nominal stress to maximum stress |
| D. | the ratio of K<sub>f</sub> to K<sub>t</sub> |
| Answer» B. the ratio of virgin fatigue life to cycles of overstressing at this same stress | |
| 5. |
The Almen Strip is used in __________ |
| A. | shot peening |
| B. | rolling |
| C. | forging |
| D. | extrusion |
| Answer» B. rolling | |
| 6. |
The carburization of the surface has positive effect in improving the fatigue property of the material. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
The par bar kind of sample used for ___________ |
| A. | tensile strength |
| B. | creep strength |
| C. | fatigue strength affected by the surface roughness |
| D. | the effect of the notch on the fatigue strength |
| Answer» D. the effect of the notch on the fatigue strength | |
| 8. |
As the surface roughness of the material increases, fatigue property of the material ___________ |
| A. | increases |
| B. | decreases |
| C. | remain the same |
| D. | no relationship |
| Answer» C. remain the same | |
| 9. |
The size of the component does play a role in deciding the fatigue life of the element. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
The value of the notch sensitivity factor lies between __________ |
| A. | 0 to 1 |
| B. | 1 to 2 |
| C. | 0 to infinity |
| D. | minus infinity to plus infinity |
| Answer» B. 1 to 2 | |