MCQOPTIONS
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MCQOPTIONS
This section includes 18 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. |
Which scale is not used to measure indentation hardness? |
| A. | Rockwell |
| B. | Bennett |
| C. | Shore |
| D. | Brinell |
| Answer» C. Shore | |
| 2. |
Which process increases the hardness of the material? |
| A. | Tempering |
| B. | Annealing |
| C. | Quenching |
| D. | Over aging |
| Answer» D. Over aging | |
| 3. |
With an increase in temperature, hardness of material _____ and ductility ______ |
| A. | Increases, increases |
| B. | Increases, decreases |
| C. | Decreases, increases |
| D. | Decreases, decreases |
| Answer» D. Decreases, decreases | |
| 4. |
WHICH_PROCESS_INCREASES_THE_HARDNESS_OF_THE_MATERIAL??$ |
| A. | Tempering |
| B. | Annealing |
| C. | Quenching |
| D. | Over aging |
| Answer» D. Over aging | |
| 5. |
Which scale is not used to measure indentation hardness?$ |
| A. | Rockwell |
| B. | Bennett |
| C. | Shore |
| D. | Brinell |
| Answer» C. Shore | |
| 6. |
Which_statement_is_false?$ |
| A. | Alloying increases hardness of the pure metal |
| B. | Dual phase alloys are harder than single phase alloys |
| C. | Interstitial solid solutions are harder than substitutional solid solutions |
| D. | Heat treatment always decreases the hardness of a material |
| Answer» E. | |
| 7. |
Coarse pearlite is harder than fine perlite for the same composition of Steel. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Which microconstituent of Steel is hardest? |
| A. | Spheroidite |
| B. | Pearlite |
| C. | Bainite |
| D. | Martensite |
| Answer» E. | |
| 9. |
Stamping operation increases hardness. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Cooling rate _____ with distance from the quenched end, and the hardness _____ |
| A. | Increases, increases |
| B. | Increases, decreases |
| C. | Decreases, increases |
| D. | Decreases, decreases |
| Answer» E. | |
| 11. |
With an increase in temperature, hardness of material _____ and ductility _____? |
| A. | Increases, increases |
| B. | Increases, decreases |
| C. | Decreases, increases |
| D. | Decreases, decreases |
| Answer» D. Decreases, decreases | |
| 12. |
When hardness is measured under dynamic loading conditions, it is known as _____ hardness. |
| A. | Brinell |
| B. | Rebound |
| C. | Knoop |
| D. | Rockwell |
| Answer» C. Knoop | |
| 13. |
What is the hardness of silicon carbides? |
| A. | 5-10 HV |
| B. | 10-14 HV |
| C. | 15-20 HV |
| D. | 20-30 HV |
| Answer» E. | |
| 14. |
______ improve hardness. |
| A. | Strain hardening |
| B. | Plasticizers |
| C. | Over aging |
| D. | Tempering |
| Answer» B. Plasticizers | |
| 15. |
_____ is the strongest bond. |
| A. | Van der Waals bond |
| B. | Metallic bond |
| C. | Covalent bond |
| D. | Hydrogen bond |
| Answer» D. Hydrogen bond | |
| 16. |
The hardness of martensite ______ with an increase in carbon content. |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | First increases and then decreases |
| Answer» B. Decreases | |
| 17. |
What is SI unit of hardness? |
| A. | kg/m<sup>3</sup> |
| B. | kg/m<sup>2</sup> |
| C. | g/m<sup>2</sup> |
| D. | N/m |
| Answer» C. g/m<sup>2</sup> | |
| 18. |
______ is the resistance of a material to plastic deformation by indentation. |
| A. | Toughness |
| B. | Resilience |
| C. | Hardness |
| D. | Stiffness |
| Answer» D. Stiffness | |