MCQOPTIONS
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MCQOPTIONS
This section includes 22 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. |
With the addition of which element, does zinc create resistance to creep? |
| A. | Pb |
| B. | Cd |
| C. | Mg |
| D. | Cu |
| Answer» D. Cu | |
| 2. |
How much copper is present in Y-alloys? |
| A. | 4% |
| B. | 2% |
| C. | 1.5% |
| D. | 1% |
| Answer» B. 2% | |
| 3. |
Which of these is not a stage in precipitation hardening treatment? |
| A. | Solution treatment |
| B. | Tempering |
| C. | Quenching |
| D. | Ageing |
| Answer» C. Quenching | |
| 4. |
What happens when the maximum strength is achieved by the aging process? |
| A. | Precipitate hardening |
| B. | Age hardening |
| C. | Over-aging |
| D. | Natural ageing |
| Answer» D. Natural ageing | |
| 5. |
Artificial aging process takes place at a temperature range of ________ |
| A. | 190-260oC |
| B. | 260-300oC |
| C. | 300-350oC |
| D. | Room temperature |
| Answer» B. 260-300oC | |
| 6. |
WHAT_HAPPENS_WHEN_THE_MAXIMUM_STRENGTH_IS_ACHIEVED_BY_AGING_PROCESS??$ |
| A. | Precipitate hardening |
| B. | Age hardening |
| C. | Over-aging |
| D. | Natural ageing |
| Answer» D. Natural ageing | |
| 7. |
ARTIFICIAL_AGING_PROCESS_TAKES_PLACE_AT_A_TEMPERATURE_RANGE_OF_________?$ |
| A. | 190-260<sup>o</sup>C |
| B. | 260-300<sup>o</sup>C |
| C. | 300-350<sup>o</sup>C |
| D. | Room temperature |
| Answer» B. 260-300<sup>o</sup>C | |
| 8. |
How much copper is present in Y-alloys?$ |
| A. | 4% |
| B. | 2% |
| C. | 1.5% |
| D. | 1% |
| Answer» B. 2% | |
| 9. |
Which of these is not a stage in precipitation hardening treatment?$ |
| A. | Solution treatment |
| B. | Tempering |
| C. | Quenching |
| D. | Ageing |
| Answer» C. Quenching | |
| 10. |
What is the temperature at which zinc become malleable |
| A. | <100 <sup>o</sup>C |
| B. | 100-150 <sup>o</sup>C |
| C. | >210 <sup>o</sup>C |
| D. | 419 <sup>o</sup>C |
| Answer» C. >210 <sup>o</sup>C | |
| 11. |
What is the appearance of zinc? |
| A. | Bluish-grey |
| B. | Red |
| C. | Yellow |
| D. | Green |
| Answer» B. Red | |
| 12. |
The most common casting process for zinc alloys is _______ |
| A. | Sand casting |
| B. | Die casting |
| C. | Investment casting |
| D. | Centrifugal casting |
| Answer» C. Investment casting | |
| 13. |
With the addition of which element, does zinc create a resistance to creep? |
| A. | Pb |
| B. | Cd |
| C. | Mg |
| D. | Cu |
| Answer» D. Cu | |
| 14. |
What is the melting point of zinc? |
| A. | 419<sup>o</sup>C |
| B. | 600<sup>o</sup>C |
| C. | 907<sup>o</sup>C |
| D. | 950<sup>o</sup>C |
| Answer» B. 600<sup>o</sup>C | |
| 15. |
Which among the following is an example of a non heat-treatable alloy? |
| A. | Al-Cu |
| B. | Al-Li |
| C. | Al-Mg-Si |
| D. | Al-Mn |
| Answer» E. | |
| 16. |
Which of these is not a property of duralumin? |
| A. | High strength |
| B. | 1/3 the weight of steel |
| C. | Excellent casting and forging abilities |
| D. | Poor machinability |
| Answer» E. | |
| 17. |
Which of the following is not a classification of aluminum alloys? |
| A. | Crucible alloys |
| B. | Wrought alloys |
| C. | Cast alloys |
| D. | Heat-treatable alloys |
| Answer» B. Wrought alloys | |
| 18. |
Which aluminum alloy is known as aircraft aluminum? |
| A. | 6061 |
| B. | 6063 |
| C. | 7068 |
| D. | 7075 |
| Answer» E. | |
| 19. |
_______ is coated onto aluminum to improve its soldering ability. |
| A. | Magnesium |
| B. | Lithium |
| C. | Tin |
| D. | Copper |
| Answer» D. Copper | |
| 20. |
Compared to copper, how is the electrical conductivity of aluminum? |
| A. | Higher |
| B. | Lower |
| C. | Equal |
| D. | Zero |
| Answer» B. Lower | |
| 21. |
What is the tensile strength of aluminum? |
| A. | 122.5 GPa |
| B. | 220 MPa |
| C. | 70.5 GPa |
| D. | 45 MPa |
| Answer» E. | |
| 22. |
What is the melting point of pure aluminum? |
| A. | 520-600<sup>o</sup>C |
| B. | 600<sup>o</sup>C |
| C. | 800<sup>o</sup>C |
| D. | 950<sup>o</sup>C |
| Answer» C. 800<sup>o</sup>C | |