MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
Vapour-jacket cooling stage of quenching process occurs _________ |
| A. | Below boiling point |
| B. | Above boiling point |
| C. | Below melting point |
| D. | At recrystallization temperature |
| Answer» C. Below melting point | |
| 2. |
Which stage of quenching is the slowest? |
| A. | Vapour-Jacket |
| B. | Vapour-Transport cooling |
| C. | Liquid-Cooling |
| D. | They are all equally slow |
| Answer» D. They are all equally slow | |
| 3. |
Which quenching medium is used for quenching of carbon and low alloy steels? |
| A. | Vegetable oil |
| B. | Water |
| C. | Air |
| D. | Animal oil |
| Answer» C. Air | |
| 4. |
Mineral oils are used in the hardening process of ____________ |
| A. | Pipes |
| B. | Carbon |
| C. | Alloy steel |
| D. | Heavy forging |
| Answer» D. Heavy forging | |
| 5. |
Normalising is best used for is what kind of materials? |
| A. | Steel castings |
| B. | Steel wires |
| C. | High carbon steels |
| D. | Low and medium carbon steels |
| Answer» E. | |
| 6. |
WHICH_QUENCHING_MEDIUM_IS_USED_FOR_QUENCHING_OF_CARBON_AND_LOW_ALLOY_STEELS??$ |
| A. | Vegetable oil |
| B. | Water |
| C. | Air |
| D. | Animal oil |
| Answer» C. Air | |
| 7. |
MINERAL_OILS_ARE_USED_IN_THE_HARDENING_PROCESS_OF_____________?$ |
| A. | Pipes |
| B. | Carbon |
| C. | Alloy steel |
| D. | Heavy forging |
| Answer» D. Heavy forging | |
| 8. |
Vapour-jacket cooling stage of quenching process occurs _________$ |
| A. | Below boiling point |
| B. | Above boiling point |
| C. | Below melting point |
| D. | At recrystallization temperature |
| Answer» C. Below melting point | |
| 9. |
Which stage of quenching is the slowest?$ |
| A. | Vapour-Jacket |
| B. | Vapour-Transport cooling |
| C. | Liquid-Cooling |
| D. | They are all equally slow |
| Answer» D. They are all equally slow | |
| 10. |
Which of the following is not a preferred vegetable oil for quenching medium? |
| A. | Linseed |
| B. | Brine |
| C. | Rapeseed |
| D. | Cottonseed |
| Answer» C. Rapeseed | |
| 11. |
Which among the following media of quenching the slowest? |
| A. | Caustic soda |
| B. | Sodium chloride |
| C. | Mineral oil |
| D. | Air |
| Answer» E. | |
| 12. |
Microstructure containing ferrite is termed as _________ |
| A. | Dark area |
| B. | White network |
| C. | Red area |
| D. | Blue zone |
| Answer» C. Red area | |
| 13. |
The structure obtained by normalising depends on __________ |
| A. | Stresses induced |
| B. | Toughness of material |
| C. | Thickness of cross section |
| D. | Strength of weld |
| Answer» D. Strength of weld | |
| 14. |
Which of the following is not applicable for normalising process? |
| A. | Economical |
| B. | Time-consuming |
| C. | Fine grain structure |
| D. | Variable properties |
| Answer» C. Fine grain structure | |
| 15. |
For normalising, the steel is heated ___________ its upper critical temperature. |
| A. | 30-40<sup>o</sup>C above |
| B. | 30-40<sup>o</sup>C C below |
| C. | 50-60<sup>o</sup>C C above |
| D. | 50-60<sup>o</sup>C C below |
| Answer» D. 50-60<sup>o</sup>C C below | |
| 16. |
Normalising is best used for is which kind of materials? |
| A. | Steel castings |
| B. | Steel wires |
| C. | High carbon steels |
| D. | Low and medium carbon steels |
| Answer» E. | |
| 17. |
How is cooling of the material done is normalising process? |
| A. | Furnace |
| B. | Cooling tower |
| C. | Still air |
| D. | Liquid chamber |
| Answer» D. Liquid chamber | |