MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
At higher temperature, if higher frequency of stress cycle is applied on the material, fracture will be ___________ and at lower frequency of stress, the fracture will be ___________ |
| A. | intergranular, intergranular |
| B. | transgranular, transgranuler |
| C. | intergranular, transgranular |
| D. | transgranuler, intergranular |
| Answer» E. | |
| 2. |
The fatigue strength of the material ___________ as the grain decreases. |
| A. | increases |
| B. | decreases |
| C. | remains the same |
| D. | no relation |
| Answer» B. decreases | |
| 3. |
At any given temperature, the creep will __________ with increasing mean stress. |
| A. | decrease |
| B. | increase |
| C. | remain the same |
| D. | no relation |
| Answer» C. remain the same | |
| 4. |
The fatigue strength of the metal ____________ with increasing temperature. |
| A. | increases |
| B. | decrease |
| C. | remains the same |
| D. | no relation |
| Answer» C. remains the same | |
| 5. |
As the temperature decreases, there is a sudden change in the fatigue limit of the material, similar to what has been observed in the ductile to brittle transition. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The fretting is the process of ____________ |
| A. | corrosion due to water |
| B. | relative motion between 2 metal causing the corrosion |
| C. | corrosion due to air |
| D. | fatigue due to excessive stress |
| Answer» C. corrosion due to air | |
| 7. |
The stainless steel components are coated with _________ to control the fatigue corrosion. |
| A. | copper |
| B. | zinc |
| C. | aluminum |
| D. | gold |
| Answer» C. aluminum | |
| 8. |
The number of pits generated on the surface of the material under fatigue corrosion are ________ than the number of pits on the surface of the same sample when it is tested only under corrosion environment. |
| A. | more |
| B. | less |
| C. | equal |
| D. | no pattern |
| Answer» B. less | |
| 9. |
Is it possible that the material which shows the fatigue limit in normal environment does not show any endurance limit in a corrosive environment. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which one of the following is only present in the corrosion fatigue? |
| A. | Crack on surface |
| B. | Pits on surface |
| C. | Striation marks |
| D. | Benchmarks |
| Answer» C. Striation marks | |
| 11. |
The corrosion fatigue is defined as the _________ |
| A. | chemical attack |
| B. | stress |
| C. | cycle stress |
| D. | chemical attack and cycle stress |
| Answer» E. | |