MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following are not true for carbo nitriding? |
| A. | Introducing carbon and nitrogen at surface layer |
| B. | Component is heated in range of 650 to 920’C |
| C. | Cyaniding is similar to carbo nitriding except that the medium is liquid |
| D. | This process gives a lower wear resistance compared to case carburising process |
| Answer» E. | |
| 2. |
Case carburising involves |
| A. | Introducing carbon at surface layer |
| B. | Heating range 880 to 980’C |
| C. | Case depths up to 2mm are possible |
| D. | All of the mentioned |
| Answer» E. | |
| 3. |
Induction hardening process involves |
| A. | Heating surface by induction in field of invariable current |
| B. | Case depth minimum of 2mm are produced |
| C. | Heating surface by induction in field of alternating current |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
Flame hardening involves |
| A. | Heating the surface above the trAnswerformation range |
| B. | Quenching after heating |
| C. | Minimum case depth is 1mm |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
INDUCTION_HARDENING_PROCESS_INVOLVES?$ |
| A. | Heating surface by induction in field of invariable current |
| B. | Case depth minimum of 2mm are produced |
| C. | Heating surface by induction in field of alternating current |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 6. |
Which of the following are not true for carbo nitriding?$ |
| A. | Introducing carbon and nitrogen at surface layer |
| B. | Component is heated in range of 650 to 920’C |
| C. | Cyaniding is similar to carbo nitriding except that the medium is liquid |
| D. | This process gives a lower wear resistance compared to case carburising process |
| Answer» E. | |
| 7. |
Case_carburising_involves$ |
| A. | Introducing carbon at surface layer |
| B. | Heating range 880 to 980’C |
| C. | Case depths up to 2mm are possible |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
Which of the following are true for nitriding? |
| A. | Nascent oxygen is involved |
| B. | Temperature range 490 to 590’C |
| C. | Gaseous or liquid medium |
| D. | All of the mentioned |
| Answer» E. | |
| 9. |
Flame hardening involve? |
| A. | Heating the surface above the trAnswerformation range |
| B. | Quenching after heating |
| C. | Minimum case depth is 1mm |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
Nickel addition in alloys |
| A. | Increases toughness |
| B. | Increases hardenability and impact resistance |
| C. | Limit grain growth during heat treatment process |
| D. | All of the mentioned |
| Answer» E. | |
| 11. |
Silicon addition in spring steel increases its toughness. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Tempering involves |
| A. | Reheating the quenched component to a temperature greater than critical temperature |
| B. | Increases the brittleness |
| C. | Reheating the quenched component to a temperature equal to critical temperature |
| D. | None of the mentioned |
| Answer» E. | |
| 13. |
Quenching |
| A. | Consists of heating the component to critical temperature |
| B. | Cooling rapidly |
| C. | Increases hardness |
| D. | All of the mentioned |
| Answer» E. | |
| 14. |
Annealing involves heating the component to a temperature |
| A. | Slightly above the critical temperature |
| B. | Equal to critical temperature |
| C. | Slightly less than critical temperature |
| D. | None of the mentioned |
| Answer» B. Equal to critical temperature | |
| 15. |
Which of the following property is affected by heat treatment? |
| A. | Hardness |
| B. | Strength |
| C. | Ductility |
| D. | All of the mentioned |
| Answer» E. | |