MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
How can caustic embrittlement be avoided? |
| A. | Addition of nickel |
| B. | Increasing potential |
| C. | Decreasing carbon |
| D. | Adding tannins |
| Answer» E. | |
| 2. |
Season-cracking can be prevented by cold-working of brass at _________ |
| A. | 15oC |
| B. | 100oC |
| C. | 300oC |
| D. | 550oC |
| Answer» D. 550oC | |
| 3. |
Dezincification of brass is prevented by addition of ________ |
| A. | Nickel |
| B. | Zinc |
| C. | Arsenic |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 4. |
10% chromium mixed with ______ can be used up to 1100oC. |
| A. | Nickel |
| B. | Chromium |
| C. | Aluminum |
| D. | Silicon |
| Answer» B. Chromium | |
| 5. |
How much chromium is required to provide oxidation resistance for use over 1000oC? |
| A. | 1% |
| B. | 6% |
| C. | 12% |
| D. | 17% |
| Answer» E. | |
| 6. |
DEZINCIFICATION_OF_BRASS_IS_PREVENTED_BY_ADDITION_OF_________?$ |
| A. | Nickel |
| B. | Zinc |
| C. | Arsenic |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 7. |
How can caustic embrittlement be avoided?$ |
| A. | Addition of nickel |
| B. | Increasing potential |
| C. | Decreasing carbon |
| D. | Adding tannins |
| Answer» E. | |
| 8. |
Season-cracking can be prevented by cold-working of brass at _________$ |
| A. | 15<sup>o</sup>C |
| B. | 100<sup>o</sup>C |
| C. | 300<sup>o</sup>C |
| D. | 550<sup>o</sup>C |
| Answer» D. 550<sup>o</sup>C | |
| 9. |
Which of these is not a way to prevent intergranular corrosion? |
| A. | Reduction of carbon level |
| B. | Quenching |
| C. | Addition of carbide forming elements |
| D. | Reduction of alloying elements |
| Answer» E. | |
| 10. |
Galvanized ion is made by dipping low carbon steel in molten zinc at ________ |
| A. | 100<sup>o</sup>C |
| B. | 150<sup>o</sup>C |
| C. | 200<sup>o</sup>C |
| D. | 450<sup>o</sup>C |
| Answer» E. | |
| 11. |
_________ is used to prevent duralumin from corrosion. |
| A. | Iron |
| B. | Kynal |
| C. | Titanium |
| D. | Alclad |
| Answer» E. | |
| 12. |
Which of these metals does not require alloying for oxidation resistance? |
| A. | Iron |
| B. | Copper |
| C. | Aluminum |
| D. | Molybdenum |
| Answer» D. Molybdenum | |
| 13. |
10% chromium mixed with ______ can be used up to 1100oC. |
| A. | Nickel |
| B. | Chromium |
| C. | Aluminum |
| D. | Silicon |
| Answer» B. Chromium | |
| 14. |
Molybdenum with hydrogen can be used up to ________ |
| A. | 1000<sup>o</sup>C |
| B. | 1500<sup>o</sup>C |
| C. | 2000<sup>o</sup>C |
| D. | 4000<sup>o</sup>C |
| Answer» C. 2000<sup>o</sup>C | |
| 15. |
How much chromium is required to provide oxidation resistance for use over 1000oC? |
| A. | 1% |
| B. | 6% |
| C. | 12% |
| D. | 17% |
| Answer» E. | |
| 16. |
Which of these materials is not added to iron for improving its oxidation resistance? |
| A. | Nickel |
| B. | Chromium |
| C. | Aluminum |
| D. | Silicon |
| Answer» E. | |