MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Strength of Materials knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A steel bar of 40mm x 40mm square cross-section is subjected to an axial compressive load of 200kN. If the length of the bar is 2m and E=200GPa, the elongation of the bar well be ____________ |
| A. | 1.25mm |
| B. | 2.70mm |
| C. | 4.05mm |
| D. | 5.40mm |
| Answer» B. 2.70mm | |
| 2. |
An axial residual compressive stress due to a manufacturing process is present on the outer surface of a rotating shaft subjected to bending. Under a given bending load, the fatigue of the shaft in the presence of the residual compressive stress is ____________ |
| A. | Decreased |
| B. | Increases or decreased, depending on the external bending load |
| C. | Neither decreased nor increased |
| D. | Increases |
| Answer» E. | |
| 3. |
When a rectangular beam is loaded transversely, the maximum compressive stress develops on ____________ |
| A. | Bottom fibre |
| B. | Top fibre |
| C. | Neutral axis |
| D. | Every cross-section |
| Answer» C. Neutral axis | |
| 4. |
A solid circular shaft of diameter d is subjected to a torque T. the maximum normal stress induced in the shaft is ____________ |
| A. | Zero |
| B. | 16T/ d<sup>3</sup> |
| C. | 32T/ d<sup>3</sup> |
| D. | None of the mentioned |
| Answer» C. 32T/ d<sup>3</sup> | |
| 5. |
A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be 3 times the maximum tensile stress, centre of gravity of the section from flange side is ____________ |
| A. | h/2 |
| B. | H/3 |
| C. | H/4 |
| D. | 2/3h |
| Answer» D. 2/3h | |
| 6. |
What will be the unit of compressive stress? |
| A. | N |
| B. | N/mm |
| C. | N/mm<sup>2</sup> |
| D. | Nmm |
| Answer» D. Nmm | |
| 7. |
For keeping the stress wholly compressive the load may be applied on a circular column anywhere within a concentric circle of diameter _____________ |
| A. | D/2 |
| B. | D/3 |
| C. | D/4 |
| D. | D/8 |
| Answer» D. D/8 | |