MCQOPTIONS
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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. |
Liquid carburizing temperature range lies between ________ |
| A. | 120-250oC |
| B. | 300-375oC |
| C. | 425-660oC |
| D. | 870-950oC |
| Answer» E. | |
| 2. |
The molten baths used in liquid carburizing are composed of _________ |
| A. | 20-50% sodium cyanide, 40% sodium carbonate |
| B. | 40% sodium cyanide, 20-50% sodium carbonate |
| C. | 10% sodium cyanide, 20% sodium carbonate |
| D. | 20% sodium cyanide, 10% sodium carbonate |
| Answer» B. 40% sodium cyanide, 20-50% sodium carbonate | |
| 3. |
Gas carburizing differs from pack carburizing due to the use of ________ |
| A. | Silicon-providing gas |
| B. | Mercury-providing gas |
| C. | Carbon-providing gas |
| D. | Argon |
| Answer» D. Argon | |
| 4. |
Prevention of carburizing of components can be done by ___________ |
| A. | Adding filler |
| B. | Electroplating |
| C. | Cold working |
| D. | Adding water |
| Answer» C. Cold working | |
| 5. |
PREVENTION_OF_CARBURIZING_OF_COMPONENTS_CAN_BE_DONE_BY____________?$ |
| A. | Adding filler |
| B. | Electroplating |
| C. | Cold working |
| D. | Adding water |
| Answer» C. Cold working | |
| 6. |
The molten baths used in liquid carburizing are composed of _________$ |
| A. | 20-50% sodium cyanide, 40% sodium carbonate |
| B. | 40% sodium cyanide, 20-50% sodium carbonate |
| C. | 10% sodium cyanide, 20% sodium carbonate |
| D. | 20% sodium cyanide, 10% sodium carbonate |
| Answer» B. 40% sodium cyanide, 20-50% sodium carbonate | |
| 7. |
Gas_carburizing_differs_from_pack_carburizing_due_to_the_use_of_________$ |
| A. | Silicon-providing gas |
| B. | Mercury-providing gas |
| C. | Carbon-providing gas |
| D. | Argon |
| Answer» D. Argon | |
| 8. |
Which of the following is not applicable for liquid carburizing? |
| A. | Uniform temperature |
| B. | Dirty work surface |
| C. | Temperature controlled by pyrometers |
| D. | High cost of carburizing |
| Answer» C. Temperature controlled by pyrometers | |
| 9. |
Liquid carburizing can be used for producing ________ cases. |
| A. | 0.05-0.1 mm |
| B. | 0.1-0.25 mm |
| C. | 0.3-0.6 mm |
| D. | 0.7-1.0 mm |
| Answer» C. 0.3-0.6 mm | |
| 10. |
Liquid_carburizing_temperature_range_lies_between_________ |
| A. | 120-250<sup>o</sup>C |
| B. | 300-375<sup>o</sup>C |
| C. | 425-660<sup>o</sup>C |
| D. | 870-950<sup>o</sup>C |
| Answer» E. | |
| 11. |
Which of the following holds true for pack carburizing? |
| A. | Efficient heating |
| B. | Uniform temperature |
| C. | Easy to handle |
| D. | Not readily adoptable |
| Answer» E. | |
| 12. |
What is the carburizing temperature? |
| A. | 150-250<sup>o</sup>C |
| B. | 400-450<sup>o</sup>C |
| C. | 650-700<sup>o</sup>C |
| D. | 900-950<sup>o</sup>C |
| Answer» E. | |
| 13. |
What kind of carbon-rich material is used in the carburizing mixture? |
| A. | Charred leather |
| B. | Sodium carbonate |
| C. | Barium carbonate |
| D. | Carbon black |
| Answer» B. Sodium carbonate | |
| 14. |
The energizer in pack carburizing makes up ________ of the total composition. |
| A. | 10% |
| B. | 25% |
| C. | 40% |
| D. | 80% |
| Answer» D. 80% | |
| 15. |
Which of the following is not a method of carburizing? |
| A. | Pack carburizing |
| B. | Gas carburizing |
| C. | Cyaniding |
| D. | Nitriding |
| Answer» E. | |
| 16. |
Steels containing ________ carbon are used for carburizing. |
| A. | 0.1-0.2% |
| B. | 0.2-0.35% |
| C. | 0.4-0.6% |
| D. | 0.7-0.9% |
| Answer» B. 0.2-0.35% | |
| 17. |
Which of the following is not a diffusion method of surface heat treatment? |
| A. | Carburizing |
| B. | Cyaniding |
| C. | Induction hardening |
| D. | Carbonitriding |
| Answer» D. Carbonitriding | |
| 18. |
The treatment of steel to get a stronger casing while maintaining a soft core is called _________ |
| A. | Surface hardening |
| B. | Tempering |
| C. | Sintering |
| D. | Surface lining |
| Answer» B. Tempering | |