MCQOPTIONS
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MCQOPTIONS
This section includes 9 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 Prandtl-Reuss stress strain relation equation is used for _____________ |
| A. | elastic material |
| B. | ideal Plastic material |
| C. | viscous material |
| D. | elastic-plastic material |
| Answer» E. | |
| 2. |
The levy mises stress-strain relation equation is used for _____________ |
| A. | elastic material |
| B. | ideal Plastic material |
| C. | viscous material |
| D. | elastic-plastic material |
| Answer» B. ideal Plastic material | |
| 3. |
Octahedral stresses are the stresses acting on the faces of a three-dimensional octahedron which has the geometric property that the faces of the planes make equal angles with each of the three principal directions of stresses. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In the following diagram, the green ellipse shows the yielding criteria according to von-mises for isotropic material. What does the red ellipse represent? |
| A. | Tresca’ yielding criteria for isotropic material |
| B. | Von-mises yielding criteria for anisotropic material |
| C. | Tresca’s yielding criteria for anisotropic material |
| D. | Experimental data of von-mises criteria for isotropic material |
| Answer» C. Tresca’s yielding criteria for anisotropic material | |
| 5. |
Von-mises and Tresca yielding criteria applies to both the isotropic and anisotropic materials. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
The greatest divergence in predicting the yield stress for distortion between the Tresca’s criteria and Von-Mises criteria occurs at __________ |
| A. | uniaxial tension/compression |
| B. | balanced biaxial stress |
| C. | pure shear stress |
| D. | always predicts equal stress |
| Answer» D. always predicts equal stress | |
| 7. |
The following diagram represents the equation σ12+σ32 – σ1σ3 = σo2 for the von-mises condition.The plot is known as the yield locus for Von-Mises criteria. Which of the following statement is not correct? |
| A. | The yield locus of Tresca criteria falls inside the of the Von-Mises criteria |
| B. | Both the Von-Mises and Tresca’s method predicts the same yield stress for uniaxial stress |
| C. | Both the Von-Mises and Tresca’s method predicts the same yield stress for balance biaxial stress |
| D. | The yield locus of Tresca criteria falls outside the of the Von-Mises criteria |
| Answer» E. | |
| 8. |
For the biaxial plane stress condition, the von Mises yield criteria can be expressed as:σ12+σ32 – σ1σ3= σo2The above equation physically represents _________ |
| A. | circle |
| B. | straight line |
| C. | ellipse |
| D. | parabola |
| Answer» D. parabola | |
| 9. |
For the biaxial plane stress condition, the von Mises yield criteria can be expressed as ___________Given that principal stresses are σ1, σ2, σ3 where σ2=0 and yield stress is σo. |
| A. | σ1+ σ3 = σo |
| B. | σ12+σ32 – σ1σ3 = σo2 |
| C. | σ1+ σ3 – σ1σ3 = σo2 |
| D. | σ1+ σ3 – σ1σ3 = σo |
| Answer» C. σ1+ σ3 – σ1σ3 = σo2 | |