MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Strength of Materials Questions and Answers 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 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. | |
| 3. |
A material of youngs modulus and Poissons ratio of unity is subjected to two principal stresses σ1 and σ2 at a point in two dimensional stress system. The strain energy per unit volume of the material is __________ |
| A. | (σ12 + σ22 – 2σ1σ2 ) / 2E |
| B. | (σ12 + σ22 + 2σ1σ2 ) / 2E |
| C. | (σ12 – σ22 – 2σ1σ2 ) / 2E |
| D. | (σ12 – σ22 – 2σ1σ2 ) / 2E |
| Answer» B. (σ12 + σ22 + 2σ1σ2 ) / 2E | |
| 4. |
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 | |
| 5. |
PL3/3EI is the deflection under the load P of a cantilever beam. What will be the strain energy? |
| A. | P2L3/3EI |
| B. | P2L3/6EI |
| C. | P2L3/4EI |
| D. | P2L3/24EI |
| Answer» C. P2L3/4EI | |
| 6. |
In a material of pure shear stress τthe strain energy stored per unit volume in the elastic, homogeneous isotropic material having elastic constants E and v will be: |
| A. | τ2/E x (1+ v) |
| B. | τ2/E x (1+ v) |
| C. | τ2/2E x (1+ v) |
| D. | τ2/E x (2+ v) |
| Answer» B. τ2/E x (1+ v) | |