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. |
There is no evidence of the fatigue crack growth on the nanoscale level, or crystallographic direction does not play any role in deciding the fatigue behavior of any material. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which stage of the fatigue crack is most significant in the high cycle fatigue? |
| A. | Crack initiation |
| B. | Slip band crack growth |
| C. | Crack growth on the plane of high tensile stress |
| D. | Ultimate ductile failure |
| Answer» C. Crack growth on the plane of high tensile stress | |
| 3. |
Which stage of the fatigue crack is most significant in the low cycle fatigue? |
| A. | Crack initiation |
| B. | Slip band crack growth |
| C. | Crack growth on the plane of high tensile stress |
| D. | Ultimate ductile failure |
| Answer» D. Ultimate ductile failure | |
| 4. |
Generally, the fatigue crack initiation takes place in which stage of the life of the component? |
| A. | In the last stage – around 90% of life |
| B. | In the beginning of life – around 10% |
| C. | In the middle – around 50% |
| D. | Can occur in any stage |
| Answer» C. In the middle – around 50% | |
| 5. |
The fatigue failure is divided into ______ major parts. |
| A. | four |
| B. | three |
| C. | two |
| D. | one |
| Answer» B. three | |
| 6. |
The ductile material gives best result in the high strain amplitude or high cycle fatigue, while the strong material gives best result in high-stress low cycle fatigue. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
The equation of fatigue valid for entire range of fatigue life is given as _____________ |
| A. | Δε/2=Δεe/2+Δεp/2 |
| B. | Δε/2=Δεe/2+Δεp |
| C. | Δε/2=Δεe+Δεp/2 |
| D. | Δε=Δεe/2+Δεp/2 |
| Answer» B. Δε/2=Δεe/2+Δεp | |
| 8. |
Smaller the value of b (fatigue strength exponent) _____________ the fatigue life. |
| A. | longer |
| B. | shorter |
| C. | no relationship |
| D. | intermediate |
| Answer» B. shorter | |
| 9. |
The Basquin’s equation is represented as ______________ |
| A. | σa/2=σ’f (2N)b |
| B. | σa=σ’f (2N)b |
| C. | σa=σ’f (N)b |
| D. | σa/2=σ’f (N)b |
| Answer» C. σa=σ’f (N)b | |
| 10. |
High cycle fatigue is described by the _______________ |
| A. | Coffin-Manson equation |
| B. | Basquin’s equation |
| C. | Morrow’s equation |
| D. | Manson equation |
| Answer» C. Morrow’s equation | |