MCQOPTIONS
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MCQOPTIONS
This section includes 45 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Upon annealing, eutectoid steel converts to which of the following? |
| A. | Perlite |
| B. | Cementite |
| C. | Austenite |
| D. | Martensite |
| Answer» B. Cementite | |
| 2. |
Mild steel can be converted into high carbons steel by which of the following heat treatment process? |
| A. | Annealing |
| B. | Normalizing |
| C. | Case hardening |
| D. | Nitriding |
| Answer» D. Nitriding | |
| 3. |
In normalizing, cooling is done in which of the following medium? |
| A. | Air |
| B. | Water |
| C. | Oil |
| D. | Furnace |
| Answer» B. Water | |
| 4. |
In Annealing, cooling is done in which of the following medium? |
| A. | Air |
| B. | Water |
| C. | Oil |
| D. | Furnace |
| Answer» E. | |
| 5. |
For steel, which one of the following properties can be enhanced upon annealing? |
| A. | Hardness |
| B. | Toughness |
| C. | Ductility |
| D. | Resilience |
| Answer» D. Resilience | |
| 6. |
Which of the following form of iron is magnetic in nature? |
| A. | α |
| B. | δ |
| C. | γ |
| D. | λ |
| Answer» B. δ | |
| 7. |
Iron possesses FCC crystal structure above (in degree centigrade)? |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| E. | ?a) 1539b) 768c) 910d) 1410 |
| Answer» D. 1410 | |
| 8. |
Iron possesses BCC crystal structure above (in degree centigrade)? |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| E. | ?a) 1539b) 768c) 910d) 1410 |
| Answer» E. ?a) 1539b) 768c) 910d) 1410 | |
| 9. |
Iron possesses BCC crystal structure up to (in degree centigrade)? |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| E. | ?a) 1539b) 768c) 910d) 1410 |
| Answer» C. 910 | |
| 10. |
As percentage of carbon increase in steel its ________decreases. |
| A. | Corrosion resistance |
| B. | Ultimate strength |
| C. | Hardness |
| D. | Ductility |
| Answer» E. | |
| 11. |
Induction hardening is the process of: |
| A. | Hardening of core |
| B. | Uniform hardening |
| C. | Selective hardening |
| D. | Hardening surface for wear resistance |
| Answer» E. | |
| 12. |
Corundum contains more than 95%. |
| A. | MgO |
| B. | SiO2 |
| C. | Al2O3 |
| D. | Steel |
| Answer» D. Steel | |
| 13. |
During heat treatment of steel, the hardness of various structures in increasing order is |
| A. | Martensite, fine pearlite, coarse pearlite, spherodite |
| B. | Fine pearlite, coarse pearlite, spherodite, martensite |
| C. | martensite, coarse pearlite, fine pearlite, Spherodite |
| D. | Spherodite, coarse pearlite, fine pearlite, martensite |
| Answer» E. | |
| 14. |
During quenching, martensite is produced: |
| A. | with an appropriate cooling rate such that the carbon has time to migrate |
| B. | with low cooling rate |
| C. | rapid cooling rate |
| D. | medium cooling rate |
| Answer» D. medium cooling rate | |
| 15. |
Hot working is done |
| A. | Above the melting point temperature of the metal |
| B. | Above the recrystallization temperature of the metal |
| C. | Below the recrystallization temperature of the metal |
| D. | Below 0°C |
| Answer» C. Below the recrystallization temperature of the metal | |
| 16. |
Carbon steel is _____. |
| A. | Produced by adding carbon in steel |
| B. | An alloy of iron and carbon with varying quantities of phosphorus and sulphur |
| C. | Purer than the cast iron |
| D. | None of these |
| Answer» C. Purer than the cast iron | |
| 17. |
Cyaniding involves the addition of ___________ for the hardening of surface. |
| A. | Nichrome |
| B. | Niobium |
| C. | Neon |
| D. | Nitrogen |
| Answer» E. | |
| 18. |
It is essential to do annealing and pickling, after performing |
| A. | drilling |
| B. | grinding |
| C. | metal spinning |
| D. | broaching |
| Answer» C. metal spinning | |
| 19. |
Cyaniding is carried out at a temperature of ___________. |
| A. | 175°C |
| B. | 950°C |
| C. | 500°C |
| D. | 1300°C |
| Answer» C. 500°C | |
| 20. |
An alloy steel contains _____ . |
| A. | more than 0.5% Mn and 0.5% Si |
| B. | less than 0.5% Mn and 0.5% Si |
| C. | more than 0.35% Mn and 0.5% Si |
| D. | less than 0.35% Mn and 0.5% Si |
| Answer» B. less than 0.5% Mn and 0.5% Si | |
| 21. |
Match the following.Heat treatmentEffectP:Tempering1.StrengtheningQ:Quenching2.TougheningR:Annealing3.HardeningS:Normalizing4.Softening |
| A. | P-2, Q-3, R-4, S-1 |
| B. | P-1, Q-1, R-3, S-2 |
| C. | P-3, Q-3, R-1, S-3 |
| D. | P-4, Q-3, R-2, S-1 |
| Answer» B. P-1, Q-1, R-3, S-2 | |
| 22. |
In order to gain toughness in hardened steel, the process usually adopted is: |
| A. | Tempering |
| B. | Annealing |
| C. | Normalizing |
| D. | Spherodising |
| Answer» B. Annealing | |
| 23. |
__________ is a surface hardening process gives maximum hardness to the surface. |
| A. | Pack hardening |
| B. | Nitriding |
| C. | Cyaniding |
| D. | Induction hardening |
| Answer» C. Cyaniding | |
| 24. |
Annealing does not ________ |
| A. | soften the metal |
| B. | relieve stresses |
| C. | refine the grain structure |
| D. | increases the yield point |
| Answer» E. | |
| 25. |
Normalising of steel is done to: |
| A. | Refine the grain structure |
| B. | Remove strains caused cold working |
| C. | Remove dislocations caused in the internal structure due to hot working |
| D. | all of the above |
| Answer» E. | |
| 26. |
Austempering heat treatment process is practiced to improve: |
| A. | hardness |
| B. | ductility |
| C. | toughness |
| D. | brittleness |
| Answer» D. brittleness | |
| 27. |
Austempering is also known as- |
| A. | Isothermal annealing |
| B. | Isothermal quenching |
| C. | Stepped quenching |
| D. | Interrupted quenching |
| Answer» C. Stepped quenching | |
| 28. |
Heat treatment of steel ______. |
| A. | can be used to change the carbon percentage. |
| B. | involves heating steel to a temperature above the recrystallization point and then cooling. |
| C. | is effective when the carbon percentage is lower than 0.8% |
| D. | cannot be used to relieve local stresses and strains. |
| Answer» C. is effective when the carbon percentage is lower than 0.8% | |
| 29. |
Precipitation hardening is applicable for |
| A. | Pure aluminium |
| B. | Low carbon steel |
| C. | Non-metal |
| D. | Aluminium-copper alloy |
| Answer» E. | |
| 30. |
Consider the following statements:1. Heat treatment is effective only in case of certain alloys.2. Cooling rate is an important factor in any heat treatment process.3. The temperature at which the change starts on heating the steel is called lower critical temperature.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 31. |
For full annealing of hypereutectoid steel requires temperature 30°C to 50°C: |
| A. | below the lower critical temperature |
| B. | above the upper critical temperature |
| C. | above the lower critical temperature |
| D. | below the upper critical temperature |
| Answer» D. below the upper critical temperature | |
| 32. |
Age hardening is generally applicable to |
| A. | cast iron |
| B. | medium carbon steel |
| C. | high alloy steel |
| D. | alloys of aluminium, magnesium, nickel etc |
| Answer» E. | |
| 33. |
Fine grain size during the solidification of a metal is achieved by: |
| A. | Lower nucleation rate |
| B. | Higher nucleation rate with lower growth rate |
| C. | Higher nucleation rate with higher growth rate |
| D. | Larger growth rate |
| Answer» C. Higher nucleation rate with higher growth rate | |
| 34. |
Heat treatment process used for steel castings is |
| A. | Normalising |
| B. | Annealing |
| C. | Tempering |
| D. | Hardening |
| Answer» B. Annealing | |
| 35. |
_____ is added to raise the yield point of low carbon steel. |
| A. | Silicon |
| B. | Carbon |
| C. | Phosphorous |
| D. | Sulphur |
| Answer» D. Sulphur | |
| 36. |
Hardenability of steel is a measure of |
| A. | the ability to harden when it is cold worked |
| B. | the maximum hardness that can be obtained when it is austenitized and then quenched |
| C. | the depth to which required hardening is obtained when it is austenitized and thenquenched |
| D. | the ability to retain its hardness when it is heated to elevated temperatures |
| Answer» D. the ability to retain its hardness when it is heated to elevated temperatures | |
| 37. |
Hardness will be highest after which of the following heat treatment process? |
| A. | Furnace cooling |
| B. | Air cooling |
| C. | Oil quenching |
| D. | Water quenching |
| Answer» E. | |
| 38. |
MILD_STEEL_CAN_BE_CONVERTED_INTO_HIGH_CARBON_STEEL_BY_USING_WHICH_OF_THE_FOLLOWING_PROCESS??$ |
| A. | Annealing |
| B. | Normalizing |
| C. | Case hardening |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 39. |
Hypoeutectoid steels on cooling during annealing process converts to:$ |
| A. | Perlite |
| B. | Cementite |
| C. | Austenite |
| D. | None of the mentioned |
| Answer» B. Cementite | |
| 40. |
In Annealing cooling is done in which of the following medium? |
| A. | Air |
| B. | Water |
| C. | Oil |
| D. | Furnace |
| Answer» E. | |
| 41. |
Annealing of steel is done to impart which one of the following property on steel? |
| A. | Hardness |
| B. | Toughness |
| C. | Ductility |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 42. |
Which of the following structure of steel is non magnetic in nature? |
| A. | α |
| B. | δ |
| C. | γ |
| D. | None of the mentioned |
| Answer» B. ‚âà√≠¬¨‚Ä¢ | |
| 43. |
γ-iron is obtained above which of the following given temperature in centigrade?$ |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| Answer» D. 1410 | |
| 44. |
α-iron is obtained below which of the following given temperature in centigrade?$ |
| A. | 1539 |
| B. | 768 |
| C. | 910 |
| D. | 1410 |
| Answer» C. 910 | |
| 45. |
Which of the following is the hardest constituent of steel? |
| A. | Ludeburite |
| B. | Austenite |
| C. | Bainite |
| D. | Martensite |
| Answer» E. | |