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. |
The toughness of the composite depends on the toughness of the matrix. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Cast materials are tougher than wrought materials. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Stress intensity factor is not a function of _______ |
| A. | Loading |
| B. | Crack size |
| C. | Volume |
| D. | Structural geometry |
| Answer» D. Structural geometry | |
| 4. |
Which material, would you choose for high toughness property on lower temperatures? |
| A. | Steel |
| B. | Aluminium |
| C. | Zinc |
| D. | SiC |
| Answer» C. Zinc | |
| 5. |
What is the reason of low toughness of grey cast iron? |
| A. | Strain rate |
| B. | Notch effect |
| C. | Grain size effect |
| D. | Crystal structure |
| Answer» C. Grain size effect | |
| 6. |
WHAT_IS_THE_REASON_OF_LOW_TOUGHNESS_OF_GREY_CAST_IRON??$ |
| A. | Strain rate |
| B. | Notch effect |
| C. | Grain size effect |
| D. | Crystal structure |
| Answer» C. Grain size effect | |
| 7. |
Stress intensity factor is not a function of _______$ |
| A. | Loading |
| B. | Crack size |
| C. | Volume |
| D. | Structural geometry |
| Answer» C. Volume | |
| 8. |
Which_material,_would_you_choose_for_high_toughness_property_on_lower_temperatures?$ |
| A. | Steel |
| B. | Aluminium |
| C. | Zinc |
| D. | SiC |
| Answer» D. SiC | |
| 9. |
A material has tensile strength 210 MPa, yield strength 117 MPa and fracture strain 0.45. What will be approximate value of toughness? |
| A. | 54.8 MJ/m<sup>3</sup> |
| B. | 67.4 MJ/m<sup>3</sup> |
| C. | 73.6 MJ/m<sup>3</sup> |
| D. | 89.2 MJ/m<sup>3</sup> |
| Answer» C. 73.6 MJ/m<sup>3</sup> | |
| 10. |
Material_has_tensile_strength_40_MPa_and_fracture_strain_0.39._What_will_be_approximate_value_of_toughness? |
| A. | 10.2 MJ/m<sup>3</sup> |
| B. | 15.6 MJ/m<sup>3</sup> |
| C. | 16.7 MJ/m<sup>3</sup> |
| D. | 18.9 MJ/m<sup>3</sup> |
| Answer» D. 18.9 MJ/m<sup>3</sup> | |
| 11. |
Which factor decreases toughness of material? |
| A. | Alloying |
| B. | Temperature |
| C. | Grain refinement |
| D. | Strain rate |
| Answer» C. Grain refinement | |
| 12. |
The toughness of material depends on _____ and _____ of material. |
| A. | Ductility, yield strength |
| B. | Ductility, tensile strength |
| C. | Stiffness, tensile strength |
| D. | Hardness, yield strength |
| Answer» E. | |
| 13. |
What is fracture toughness of magnesia in terms of stress intensity factor? |
| A. | 1 MPa m<sup>1/2</sup> |
| B. | 2 MPa m<sup>1/2</sup> |
| C. | 3 MPa m<sup>1/2</sup> |
| D. | 5 MPa m<sup>1/2</sup> |
| Answer» D. 5 MPa m<sup>1/2</sup> | |
| 14. |
What is fracture toughness range of ceramics? |
| A. | 2-8 MN m<sup>-3/2</sup> |
| B. | 1-10 MN m<sup>-3/2</sup> |
| C. | 10-30 MN m<sup>-3/2</sup> |
| D. | 30-40 MN m<sup>-3/2</sup> |
| Answer» C. 10-30 MN m<sup>-3/2</sup> | |
| 15. |
What is the SI unit of tensile toughness? |
| A. | N/m |
| B. | in.lbf.in<sup>-3</sup> |
| C. | Jm<sup>-3</sup> |
| D. | Jm<sup>3</sup> |
| Answer» D. Jm<sup>3</sup> | |
| 16. |
The property of a material which enables it to absorb energy and deform plastically without fracture is ______ |
| A. | Stiffness |
| B. | Toughness |
| C. | Hardness |
| D. | Resilience |
| Answer» C. Hardness | |