MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A flat plate 30mm wide and “t”mm wide is subjected to a tensile force of 5kN. The plate has a circular hole of diameter 15mm with the centre coinciding with the diagonal intersection point of the rectangle. If stress concentration factor=2.16, find the thickness of the plate if maximum allowable tensile stress is 80N/mm². |
| A. | 8mm |
| B. | 9mm |
| C. | 10mm |
| D. | 12mm |
| Answer» C. 10mm | |
| 2. |
A flat plate 30mm wide and “t”mm wide is subjected to a tensile force of 5kN. The plate has a circular hole of diameter 15mm with the centre coinciding with the diagonal intersection point of the rectangle. If stress concentration factor=2.16, find the thickness of the plate if maximum allowable tensile stress is 80N/mm²?# |
| A. | 8mm |
| B. | 9mm |
| C. | 10mm |
| D. | 12mm |
| Answer» C. 10mm | |
| 3. |
Which of the following reduces the stress concentration? |
| A. | Use of multiple notches |
| B. | Drilling additional holes |
| C. | Removal of undesired material |
| D. | Each of the mentioned |
| Answer» E. | |
| 4. |
Use of multiple notches in a V shaped flat plate will |
| A. | Reduce the stress concentration |
| B. | Increase the stress concentration |
| C. | No effect |
| D. | Cannot be determined |
| Answer» B. Increase the stress concentration | |
| 5. |
Is it logical to use fluid analogy to understand the phenomenon of stress concentration? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
In which of the following case stress concentration factor is ignored? |
| A. | Ductile material under static load |
| B. | Ductile material under fluctuating load |
| C. | Brittle material under static load |
| D. | Brittle material under fluctuating load |
| Answer» B. Ductile material under fluctuating load | |
| 7. |
For an elliptical hole on a flat plate, if width of the hole in direction of the load decrease, Stress Concentration Factor will______ |
| A. | Increase |
| B. | Decrease |
| C. | Remains constant |
| D. | Can’t be determined. Varies from material to material |
| Answer» B. Decrease | |
| 8. |
If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 9. |
Stress Concentration Factor is the ratio of nominal stress obtained by elementary equations for minimum cross-section and highest value of actual stress near discontinuity. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Stress concentration is defined as the localization of high stresses due to irregularities present in the component and no changes of the cross section. |
| A. | True |
| B. | False |
| Answer» C. | |