MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
The effect of the stress riser is much more pronounced in a brittle material than a ductile material. Which of the following is not the correct explanation for this behavior? |
| A. | Strain hardening occurs in ductile material, which increases the required stress for the flow of crack |
| B. | Strain hardening does not occur in a brittle material, so it results in sudden propagation of the crack |
| C. | Redistribution of stress does not occur in a brittle material |
| D. | The toughness of brittle material is much more than ductile material |
| Answer» E. | |
| 2. |
The value of stress concentration for circular hole in a plate subjected to uniform stress of is equal to ________ |
| A. | 1 |
| B. | 4 |
| C. | 3 |
| D. | 10 |
| Answer» D. 10 | |
| 3. |
In addition to producing the stress concentration, a notch also creates a localized condition of the biaxial or triaxial stress. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The stress concentration is generally expressed by a theoretical stress-concentration factor kt. Generally, Kt is described as the ratio of _________________ |
| A. | <sub>max</sub> / <sub>min</sub> |
| B. | <sub>min</sub>/ <sub>max</sub> |
| C. | <sub>max</sub>/ <sub>nominal</sub> |
| D. | <sub>nominal</sub>/ <sub>max</sub> |
| Answer» D. <sub>nominal</sub>/ <sub>max</sub> | |
| 5. |
A geometrical discontinuity in a body, such as a hole or a notch result in nonuniform distribution of stress at the vicinity of discontinuity. At the region near the discontinuity, the local stress will be higher than normal stress distribution. |
| A. | True |
| B. | False |
| Answer» B. False | |