MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Hardness readings are taken every ________ after quenching in Jominy end-quench test. |
| A. | 0.01 mm |
| B. | 0.1 mm |
| C. | 1.6 mm |
| D. | 2.5 mm |
| Answer» D. 2.5 mm | |
| 2. |
Quenching of the sample in Jominy end-quench method is done at _______ |
| A. | 0oC |
| B. | 25oC |
| C. | 125oC |
| D. | 200oC |
| Answer» C. 125oC | |
| 3. |
Which of the following factors affect the hardenability of a material? |
| A. | Composition of steel |
| B. | Grain size |
| C. | Temperature of specimen |
| D. | Quenching medium |
| Answer» D. Quenching medium | |
| 4. |
Hardenability of a material can be measured using __________ test. |
| A. | Jominy end-quench |
| B. | Charpy |
| C. | Rockwell |
| D. | Izod |
| Answer» B. Charpy | |
| 5. |
___________ is defined as the ease of forming martensite. |
| A. | Hardness |
| B. | Hardenability |
| C. | Toughness |
| D. | Strength |
| Answer» C. Toughness | |
| 6. |
The hardening process is carried out on ________ steel. |
| A. | No carbon |
| B. | Low carbon |
| C. | Medium carbon |
| D. | High carbon |
| Answer» E. | |
| 7. |
The slip does not occur in martensite due to the presence of _______ in the lattice. |
| A. | Silicon |
| B. | Germanium |
| C. | Carbon |
| D. | Tin |
| Answer» D. Tin | |
| 8. |
HARDENABILITY_OF_A_MATERIAL_CAN_BE_MEASURED_USING____________TEST.?$ |
| A. | Jominy end-quench |
| B. | Charpy |
| C. | Rockwell |
| D. | Izod |
| Answer» B. Charpy | |
| 9. |
Quenching of the sample in Jominy end-quench method is done at _______$ |
| A. | 0<sup>o</sup>C |
| B. | 25<sup>o</sup>C |
| C. | 125<sup>o</sup>C |
| D. | 200<sup>o</sup>C |
| Answer» C. 125<sup>o</sup>C | |
| 10. |
Which_of_the_following_factors_affect_the_hardenability_of_a_material?$ |
| A. | Composition of steel |
| B. | Grain size |
| C. | Temperature of specimen |
| D. | Quenching medium |
| Answer» D. Quenching medium | |
| 11. |
Hardness_readings_are_taken_every__________after_quenching_in_Jominy_end-quench_test. |
| A. | 0.01 mm |
| B. | 0.1 mm |
| C. | 1.6 mm |
| D. | 2.5 mm |
| Answer» D. 2.5 mm | |
| 12. |
___________ is defined as the ease of forming martensite? |
| A. | Hardness |
| B. | Hardenability |
| C. | Toughness |
| D. | Strength |
| Answer» C. Toughness | |
| 13. |
How does the size of the specimen affect the hardness of steel? |
| A. | Smaller size results is high hardness |
| B. | Smaller size results in low hardness |
| C. | Larger size results in high hardness |
| D. | No change is found |
| Answer» B. Smaller size results in low hardness | |
| 14. |
How does the rate of cooling affect the hardness of steel? |
| A. | Faster cooling results in low hardness |
| B. | Slow cooling results in high hardness |
| C. | Fast cooling results in high hardness |
| D. | No change is found |
| Answer» D. No change is found | |
| 15. |
The hardening process is carried out on ________ steel |
| A. | No carbon |
| B. | Low carbon |
| C. | Medium carbon |
| D. | High carbon |
| Answer» E. | |
| 16. |
Phase transformation during hardening transforms _________ |
| A. | BCC to FCC |
| B. | FCC to BCT |
| C. | BCT to HCP |
| D. | FCC to HCP |
| Answer» C. BCT to HCP | |
| 17. |
The cooling rate must be _________ the critical cooling rate for hardening of steel by quenching. |
| A. | Higher than |
| B. | Lower than |
| C. | Equal to |
| D. | Half of |
| Answer» B. Lower than | |
| 18. |
For hardening of steel by quenching, the steel is cooled in __________ |
| A. | Furnace |
| B. | Still air |
| C. | Oil bath |
| D. | Cooling tower |
| Answer» D. Cooling tower | |