MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Solid solution strengthening improves ductility in general. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
With an increase in the amount of zinc, electrical conductivity of copper ___________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | May increase or decrease |
| Answer» B. Increases | |
| 3. |
A strength of material is proportional to __________ |
| A. | C |
| B. | C1/2 |
| C. | C2 |
| D. | C-1 |
| Answer» C. C2 | |
| 4. |
Steel is a _______ alloy. |
| A. | Fe-C |
| B. | Fe-Cr |
| C. | Fe-N |
| D. | Fe-Si |
| Answer» B. Fe-Cr | |
| 5. |
Which of the following is not an example of isomorphous system? |
| A. | Mo-W |
| B. | Ag-Au |
| C. | Fe-C |
| D. | Cu-Ni |
| Answer» D. Cu-Ni | |
| 6. |
For noticeable materials’ strengthening, alloying should be done with atoms of a solute material having ________ |
| A. | High shear modulus |
| B. | High ductility |
| C. | Low toughness |
| D. | Low elastic modulus |
| Answer» B. High ductility | |
| 7. |
Precipitation hardened metal alloys X consists of 95% phase-A and 5% phase-B. If the phase-B is in coarse precipitate form, the strength of the material will be higher as compared to when the phase-B is in fine precipitate form. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Two-phase alloys consist of a hard and soft phase. If the hard phase is Continous along the grain boundary the resultant alloy will be _______ |
| A. | ductile |
| B. | brittle |
| C. | can be ductile or can be brittle |
| D. | depends on the difference of hardness |
| Answer» C. can be ductile or can be brittle | |
| 9. |
Which of the following is not a long-range interaction about the solid solution strengthening? |
| A. | Elastic interaction |
| B. | Long-range order interaction |
| C. | Stacking fault interaction |
| D. | Modulus interaction |
| Answer» D. Modulus interaction | |
| 10. |
Which of the following is not part of Hume Rothery rule? |
| A. | The atomic radius of solute and solvent should not exceed more than 15% |
| B. | The solute and solvent should have the same crystal structure |
| C. | Both the metal have the same valency |
| D. | There should be a significant difference in electronegativity of metals |
| Answer» E. | |
| 11. |
The solubility limit of copper in zinc is much higher than the solubility of zinc in copper. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The metal with strong chemical affinity tends to form a good solid solution. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
WHICH_OF_THE_FOLLOWING_IS_NOT_AN_EXAMPLE_OF_ISOMORPHOUS_SYSTEM??$ |
| A. | Mo-W |
| B. | Ag-Au |
| C. | Fe-C |
| D. | Cu-Ni |
| Answer» B. Ag-Au | |
| 14. |
A strength of material is proportional to __________$ |
| A. | C |
| B. | C<sup>1/2</sup> |
| C. | C<sup>2</sup> |
| D. | C<sup>-1</sup> |
| Answer» B. C<sup>1/2</sup> | |
| 15. |
Steel_is_a_________alloy.$ |
| A. | Fe-C |
| B. | Fe-Cr |
| C. | Fe-N |
| D. | Fe-Si |
| Answer» C. Fe-N | |
| 16. |
With_an_increase_in_the_amount_of_zinc,_electrical_conductivity_of_copper____________ |
| A. | Decreases |
| B. | Increases |
| C. | Remains constant |
| D. | May increase or decrease |
| Answer» C. Remains constant | |
| 17. |
Which of the following is an example of completely miscible binary systems? |
| A. | Cu-Zn |
| B. | Cu-Sn |
| C. | Ag-Au |
| D. | Fe-C |
| Answer» D. Fe-C | |
| 18. |
According to Hume-Rothery rules, for unlimited solubility difference in atomic sizes of solute and solvent should be less than __________ |
| A. | 10% |
| B. | 15% |
| C. | 20% |
| D. | 25% |
| Answer» D. 25% | |
| 19. |
For noticeable materials’ strengthening, alloying should be done with atoms of a solute material having ________$ |
| A. | High shear modulus |
| B. | High ductility |
| C. | Low toughness |
| D. | Low elastic modulus |
| Answer» C. Low toughness | |
| 20. |
Solid solution strengthening depends on the valency of solute atoms. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
Substitutional solute atoms result in __________ and interstitial atoms in __________ |
| A. | Symmetrical stress field, the symmetrical stress field |
| B. | Symmetrical stress field, the non-symmetrical stress field |
| C. | Non-symmetrical stress field, the symmetrical stress field |
| D. | Non-symmetrical stress field, the non-symmetrical stress field |
| Answer» B. Symmetrical stress field, the non-symmetrical stress field | |
| 22. |
i-k, ii-l, iii-i, iv- j |
| A. | i-k, ii-l, iii-j, iv- i |
| B. | i-l, ii-k, iii-i, iv- j |
| C. | i-l, ii-k, iii-j, iv- i |
| Answer» C. i-l, ii-k, iii-j, iv- i | |
| 23. |
Asymmetrical stress field results in _________ strengthening in comparison to non-symmetrical stress field. |
| A. | Less |
| B. | Higher |
| C. | Very high |
| D. | Equal |
| Answer» B. Higher | |