MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Rate of strain hardening is equal to ___________ |
| A. | the slope of the flow curve |
| B. | the intercept of flow curve on the x-axis at the yield point |
| C. | the intercept of flow curve in y-axis at the yield point |
| D. | slope at maximum tensile stress |
| Answer» B. the intercept of flow curve on the x-axis at the yield point | |
| 2. |
The amount of energy stored by the metal during deformation does not depend on ________ |
| A. | initial temperature |
| B. | solute content |
| C. | deformation type |
| D. | heating method |
| Answer» E. | |
| 3. |
During plastic deformation, the percentage of energy which is retained by lattice, in the form of lattice strain or other method is roughly equal to__________ |
| A. | 1% |
| B. | 10% |
| C. | 50% |
| D. | 90% |
| Answer» C. 50% | |
| 4. |
Which of the following is the region of highest dislocation density? |
| A. | Grain interior |
| B. | Grain boundary |
| C. | Cell interior |
| D. | Cell wall |
| Answer» E. | |
| 5. |
In X-ray diffraction technique, the cold-worked sample is identified by _________ |
| A. | width of peak |
| B. | intensity of the peak |
| C. | position of peak |
| D. | not possible to identify in XRD |
| Answer» B. intensity of the peak | |
| 6. |
In which crystal the strain hardening will be least? |
| A. | BCC |
| B. | FCC |
| C. | BCT |
| D. | HCP |
| Answer» E. | |
| 7. |
Which of the following is a thermo-mechanical treatment? |
| A. | Quenching |
| B. | Annealing |
| C. | Ausforming |
| D. | Cold working |
| Answer» D. Cold working | |
| 8. |
What does Region C represent in the following time-temperature transformation diagram (TTT)? |
| A. | Pearlite |
| B. | Bainite |
| C. | Austenite |
| D. | Martensite |
| Answer» E. | |
| 9. |
What does Region B represent in the following time-temperature transformation diagram (TTT)? |
| A. | Pearlite |
| B. | Bainite |
| C. | Austenite |
| D. | Martensite |
| Answer» C. Austenite | |
| 10. |
What does Region A represent in the following time-temperature transformation diagram (TTT)? |
| A. | Pearlite |
| B. | Bainite |
| C. | Austenite |
| D. | Martensite |
| Answer» B. Bainite | |
| 11. |
As the carbon content of the steel increases, the hardness of steel __________ on quenching. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | no relation |
| Answer» B. decreases | |
| 12. |
The habit plane is the plane which ________________ |
| A. | is parallel to the principal normal stress direction |
| B. | is parallel to the principal shear stress direction |
| C. | remains unaffected during transformation |
| D. | has the maximum atomic density |
| Answer» D. has the maximum atomic density | |
| 13. |
The martensitic transformation occurs only in iron and carbon system or alloys. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
The transformation of austenite to martensite is diffusionless. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
Which of the following process does not produce the vacancy in the lattice? |
| A. | Movement jog by dislocation intersection |
| B. | Quenching near melting point temperature |
| C. | Irradiation of metal with high energy particles |
| D. | Grain growth |
| Answer» E. | |