MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Fracture stress decreases as fiber diameter decreases. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
For polymers close to glass transition temperature which of the following can be a value of G? |
| A. | 1 J/m2 |
| B. | 900 J/m2 |
| C. | 1200 J/m2 |
| D. | 1400 J/m2 |
| Answer» C. 1200 J/m2 | |
| 3. |
What is the unit of G from Griffith’s energy criterion? |
| A. | J-m2 |
| B. | J-m |
| C. | J/m2 |
| D. | J/m |
| Answer» D. J/m | |
| 4. |
Which of the following scientist proposed a modification to Griffith’s theory? |
| A. | G. R. Irwin |
| B. | Albert Einstein |
| C. | Isaac Newton |
| D. | There was no modification proposed. |
| Answer» B. Albert Einstein | |
| 5. |
FOR_POLYMERS_CLOSE_TO_GLASS_TRANSITION_TEMPERATURE_WHICH_OF_THE_FOLLOWING_CAN_BE_A_VALUE_OF_G??$ |
| A. | 1 J/m<sup>2</sup> |
| B. | 900 J/m<sup>2</sup> |
| C. | 1200 J/m<sup>2</sup> |
| D. | 1400 J/m<sup>2</sup> |
| Answer» C. 1200 J/m<sup>2</sup> | |
| 6. |
Fracture_stress_decreases_as_fiber_diameter_decreases.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the unit of G from Griffith’s energy criterion?# |
| A. | J-m<sup>2</sup> |
| B. | J-m |
| C. | J/m<sup>2</sup> |
| D. | J/m |
| Answer» D. J/m | |
| 8. |
Which of the following scientist proposed a modification to Griffith’s theory?$ |
| A. | G. R. Irwin |
| B. | Albert Einstein |
| C. | Isaac Newton |
| D. | There was no modification proposed. |
| Answer» B. Albert Einstein | |
| 9. |
According to Griffith if f is stress at fracture and a is flaw length then which of the following is true? |
| A. | f*a<sup>1/2</sup> |
| B. | f*a |
| C. | f/a |
| D. | f/a<sup>1/2</sup> |
| Answer» B. f*a | |
| 10. |
What amount of actual stress would be needed to fracture bulk glass? |
| A. | 10 MPa |
| B. | 20 MPa |
| C. | 100 MPa |
| D. | 50 MPa |
| Answer» D. 50 MPa | |
| 11. |
Fractography is the study of surfaces of materials which are fractured |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Which of the following is not a mode of application of force for crack propagation? |
| A. | Opening mode |
| B. | Sliding mode |
| C. | Tearing mode |
| D. | Rolling mode |
| Answer» E. | |
| 13. |
Which of the following part of mechanics deals with study of crack propagation? |
| A. | Solid mechanics |
| B. | Fluid mechanics |
| C. | Applied mechanics |
| D. | Fracture mechanics |
| Answer» E. | |