MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 tensile load of 60kN is gradually applied to a circular bar of 4cm diameter and 5m long. What is the strain energy in the rod if the load is applied suddenly (E = 2 105 N/mm2)? |
| A. | d143.23 N-m |
| B. | 140.51 N-m |
| C. | 135.145 N-m |
| D. | 197.214 N-m |
| Answer» B. 140.51 N-m | |
| 2. |
A tensile load of 50kN is gradually applied to a circular bar of 5cm diameter and 5m long. What is the strain energy absorbed by the rod (E = 200GPa)? |
| A. | 14 N-m |
| B. | 15.9 N-mm |
| C. | 15.9 N-m |
| D. | 14 N-mm |
| Answer» D. 14 N-mm | |
| 3. |
A tensile load of 60kN is gradually applied to a circular bar of 4cm diameter and 5m long. What is the stretch in the rod if E = 2 105 N/mm2? |
| A. | 1.1mm |
| B. | 1.24mm |
| C. | 2mm |
| D. | 1.19mm |
| Answer» E. | |
| 4. |
A bar of cross-section A and length L is subjected to an axial load W. the strain energy stored in the bar would be __________ |
| A. | WL / AE |
| B. | W<sup>2</sup>L / 4AE |
| C. | W<sup>2</sup>L / 2AE |
| D. | WL / 4AE |
| Answer» D. WL / 4AE | |
| 5. |
The strain energy in a member is proportional to __________ |
| A. | Product of stress and the strain |
| B. | Total strain multiplied by the volume of the member |
| C. | The maximum strain multiplied by the length of the member |
| D. | Product of strain and Young s modulus of the material |
| Answer» E. | |
| 6. |
If forces P, P and P of a system are such that the force polygon does not close, then the system will __________ |
| A. | Be in equilibrium |
| B. | Reduce to a resultant force |
| C. | Reduce to a couple |
| D. | Not be in equilibrium |
| Answer» E. | |
| 7. |
A material of youngs modulus and Poissons ratio of unity is subjected to two principal stresses 1 and 2 at a point in two dimensional stress system. The strain energy per unit volume of the material is __________ |
| A. | ( <sub>1</sub><sup>2</sup> + <sub>2</sub><sup>2</sup> 2 <sub>1</sub> <sub>2</sub> ) / 2E |
| B. | ( <sub>1</sub><sup>2</sup> + <sub>2</sub><sup>2</sup> + 2 <sub>1</sub> <sub>2</sub> ) / 2E |
| C. | ( <sub>1</sub><sup>2</sup> <sub>2</sub><sup>2</sup> 2 <sub>1</sub> <sub>2</sub> ) / 2E |
| D. | ( <sub>1</sub><sup>2</sup> <sub>2</sub><sup>2</sup> 2 <sub>1</sub> <sub>2</sub> ) / 2E |
| Answer» B. ( <sub>1</sub><sup>2</sup> + <sub>2</sub><sup>2</sup> + 2 <sub>1</sub> <sub>2</sub> ) / 2E | |
| 8. |
A rectangular block of size 400mm x 50mm x 50mm is subjected to a shear stress of 500kg/cm2. If the modulus of rigidity of the material is 1 106 kg/cm2, the strain energy will be __________ |
| A. | 125 kg-cm |
| B. | 1000 kg-cm |
| C. | 500 kg-cm |
| D. | 100 kg-cm |
| Answer» B. 1000 kg-cm | |
| 9. |
In a material of pure shear stress the strain energy stored per unit volume in the elastic, homogeneous isotropic material having elastic constants E and v will be: |
| A. | <sup>2</sup>/E x (1+ v) |
| B. | <sup>2</sup>/E x (1+ v) |
| C. | <sup>2</sup>/2E x (1+ v) |
| D. | <sup>2</sup>/E x (2+ v) |
| Answer» B. <sup>2</sup>/E x (1+ v) | |
| 10. |
Strain energy stored in a body to uniform stress s of volume V and modulus of elasticity E is __________ |
| A. | s<sup>2</sup>V/2E |
| B. | sV/E |
| C. | sV<sup>2</sup>/E |
| D. | sV/2E |
| Answer» B. sV/E | |