MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
With increase in porosity Young’s modulus ________ |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | First increases and then decreases |
| Answer» C. Remains constant | |
| 2. |
If Young’s modulus of tungsten carbide is 450 GPa, what will be Young’s modulus for 4% porous tungsten carbide? |
| A. | 450 GPa |
| B. | 415.8 GPa |
| C. | 410.4 GPa |
| D. | 425.8 GPa |
| Answer» C. 410.4 GPa | |
| 3. |
What causes blow holes in casting? |
| A. | Soft ramming |
| B. | Venting |
| C. | Insufficient permeability |
| D. | Risering system |
| Answer» D. Risering system | |
| 4. |
Voids formed due to shrinkage of material, during its solidification, are known as _______ |
| A. | Cavitation |
| B. | Porosity |
| C. | Inclusion |
| D. | Blow hole |
| Answer» B. Porosity | |
| 5. |
WHAT_CAUSES_BLOW_HOLES_IN_CASTING??$ |
| A. | Soft ramming |
| B. | Venting |
| C. | Insufficient permeability |
| D. | Risering system |
| Answer» D. Risering system | |
| 6. |
With increase in porosity Young’s modulus ________$# |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | First increases and then decreases |
| Answer» C. Remains constant | |
| 7. |
If_Young’s_modulus_of_tungsten_carbide_is_450_GPa,_what_will_be_Young’s_modulus_for_4%_porous_tungsten_carbide?$# |
| A. | 450 GPa |
| B. | 415.8 GPa |
| C. | 410.4 GPa |
| D. | 425.8 GPa |
| Answer» C. 410.4 GPa | |
| 8. |
Ceramics are sensitive for defects like inclusion and void. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Voids formed due to shrinkage of material, during its solidification, are known as ______? |
| A. | Cavitation |
| B. | Porosity |
| C. | Inclusion |
| D. | Blow hole |
| Answer» B. Porosity | |
| 10. |
Hydrogen induced cracks are generally intergranular. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
Which one of the following factor does not favour void formation? |
| A. | Slow quenching rates |
| B. | Low ageing temperature |
| C. | High ageing temperature |
| D. | Presence of gas |
| Answer» C. High ageing temperature | |
| 12. |
What is the dimension of voids? |
| A. | 10<sup>6</sup> – 10<sup>8</sup> nm |
| B. | 10 – 10<sup>7</sup> nm |
| C. | 10 – 10<sup>5</sup> nm |
| D. | 10 – 10<sup>2</sup> nm |
| Answer» B. 10 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 10<sup>7</sup> nm | |
| 13. |
Precipitation hardening deteriorates ______ of material. |
| A. | Tensile strength |
| B. | High temperature properties |
| C. | Ductility |
| D. | Hardness |
| Answer» D. Hardness | |
| 14. |
Cellular precipitation is also known as ______ |
| A. | Continuous |
| B. | Discontinuance |
| C. | Coherent |
| D. | Semi coherent |
| Answer» C. Coherent | |
| 15. |
Continuous precipitation is observed in the system ________ |
| A. | Fe-C |
| B. | Pb-Sn |
| C. | Al-Cu |
| D. | Al-Mg |
| Answer» D. Al-Mg | |
| 16. |
Which one of the following, is not volume defect? |
| A. | Pore |
| B. | Void |
| C. | Vacancy |
| D. | Blow hole |
| Answer» D. Blow hole | |