MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials and Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the ductility of age-hardened Al-4.5%Cu alloy? |
| A. | 15% |
| B. | 20% |
| C. | 40% |
| D. | 55% |
| Answer» C. 40% | |
| 2. |
Which of the following is not a stage of the age-hardening process? |
| A. | Heating |
| B. | Quenching |
| C. | Tempering |
| D. | Aging |
| Answer» D. Aging | |
| 3. |
What is the relation of solubility and temperature for an age-hardening alloy? |
| A. | Increases with decrease in temperature |
| B. | Decreases with decrease in temperature |
| C. | Increases irrespective of temperature |
| D. | No change due to temperature |
| Answer» C. Increases irrespective of temperature | |
| 4. |
Increase of hardness of an alloy with an increase in time is known as ________ |
| A. | Age hardening |
| B. | Solution hardening |
| C. | Dispersion hardening |
| D. | Phase transformation hardening |
| Answer» B. Solution hardening | |
| 5. |
Carbon steels containing ________ carbon are easier to hard-face. |
| A. | < 0.35% |
| B. | 3.2% |
| C. | 5.18% |
| D. | > 6.77% |
| Answer» B. 3.2% | |
| 6. |
How does the amount of cobalt affect the wear of alloys? |
| A. | High cobalt high wear |
| B. | Low cobalt high wear |
| C. | No cobalt high wear |
| D. | Cobalt does not affect the wear |
| Answer» B. Low cobalt high wear | |
| 7. |
What is the hardness of molybdenum powder? |
| A. | 168-183 Vickers |
| B. | 246-263 Vickers |
| C. | 321-368 Vickers |
| D. | 330-390 Vickers |
| Answer» D. 330-390 Vickers | |
| 8. |
Which of the following can be used for hard coating applications? |
| A. | High-chromium stainless steel |
| B. | Heat-treated stainless steel |
| C. | Hardened brass |
| D. | Aluminum |
| Answer» B. Heat-treated stainless steel | |
| 9. |
Plasma is metal spraying can obtain temperatures up to ________ |
| A. | 10,000 F |
| B. | 20,000 F |
| C. | 30,000 F |
| D. | 60,000 F |
| Answer» D. 60,000 F | |
| 10. |
Usage of ___________ for metallizing helps spray the metal powder in the correct place. |
| A. | Air, oxygen, and combustible gas |
| B. | Oxyacetylene powder gun |
| C. | Silicon dioxide |
| D. | Hydrogen peroxide |
| Answer» C. Silicon dioxide | |