MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
Increasing the mean stress ___________ the crack growth rate. |
| A. | increases |
| B. | decreases |
| C. | does not change |
| D. | no relationship |
| Answer» B. decreases | |
| 2. |
The relationship between the stress intensity factor and crack growth is given as _______ |
| A. | da/dN = A ( K) |
| B. | da/dN = A ( K)<sup>p</sup> |
| C. | da/dN = ( K) |
| D. | da/dN = A (1/ K)<sup>p</sup> |
| Answer» C. da/dN = ( K) | |
| 3. |
With decrease in the temperature, the fatigue strength of the material ___________ |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | no relationship |
| Answer» C. remains constant | |
| 4. |
The plastic blunting process is the growth mechanism of crack, followed by the ___________ |
| A. | first stage of crack growth |
| B. | second stage of the crack growth |
| C. | third stage of the crack growth |
| D. | termination of the crack |
| Answer» C. third stage of the crack growth | |
| 5. |
The fatigue strain does not cause considerable strain hardening of successive cycle with growth of cracks. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The fatigue crack propagation is _____________ in nature. |
| A. | intergranular |
| B. | transgranular |
| C. | along the high atomic density planes |
| D. | along the low-density atomic planes |
| Answer» C. along the high atomic density planes | |
| 7. |
The number of slip band in the fatigue is directly proportional to the number of cycles. |
| A. | True |
| B. | False |
| Answer» C. | |