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. |
What is the value of residual induction of alnico alloys? |
| A. | 0.9 |
| B. | 0.95 |
| C. | 1.0 |
| D. | 0.8-1.2 |
| Answer» D. 0.8-1.2 | |
| 2. |
What is the coercive force of high carbon steel? |
| A. | 3.98 |
| B. | 5.57 |
| C. | 18.31 |
| D. | 60 |
| Answer» B. 5.57 | |
| 3. |
Yttrium-iron-garnet is used as microwave isolators in the ____ range. |
| A. | KHz |
| B. | MHz |
| C. | GHz |
| D. | THz |
| Answer» D. THz | |
| 4. |
Which of the following is not a use of magnesium-manganese ferrites? |
| A. | Microwave isolator |
| B. | Gyrators |
| C. | Wires |
| D. | Memory core of computer |
| Answer» D. Memory core of computer | |
| 5. |
A _____ cooling rate solidifies metallic glass made from iron- base alloys. |
| A. | 10oC s-1 |
| B. | 100oC s-1 |
| C. | 1000oC s-1 |
| D. | 10000oC s-1 |
| Answer» E. | |
| 6. |
Which of the following is an example of soft magnetic material? |
| A. | Permalloy |
| B. | Strontium |
| C. | Alnico |
| D. | Neodymium |
| Answer» B. Strontium | |
| 7. |
YTTRIUM-IRON-GARNET_IS_USED_AS_MICROWAVE_ISOLATORS_IN_THE______RANGE?$ |
| A. | KHz |
| B. | MHz |
| C. | GHz |
| D. | THz |
| Answer» D. THz | |
| 8. |
WHICH_OF_THE_FOLLOWING_IS_NOT_A_USE_OF_MAGNESIUM-MANGANESE_FERRITES??$ |
| A. | Microwave isolator |
| B. | Gyrators |
| C. | Wires |
| D. | Memory core of computer |
| Answer» D. Memory core of computer | |
| 9. |
What is the value of residual induction of alnico alloys?$ |
| A. | 0.9 |
| B. | 0.95 |
| C. | 1.0 |
| D. | 0.8-1.2 |
| Answer» D. 0.8-1.2 | |
| 10. |
What is the coercive force of high carbon steel?$ |
| A. | 3.98 |
| B. | 5.57 |
| C. | 18.31 |
| D. | 60 |
| Answer» B. 5.57 | |
| 11. |
A _____ cooling rate solidifies metallic glass made from iron- base alloys? |
| A. | 10<sup>o</sup>C s<sup>-1</sup> |
| B. | 100<sup>o</sup>C s<sup>-1</sup> |
| C. | 1000<sup>o</sup>C s<sup>-1</sup> |
| D. | 10000<sup>o</sup>C s<sup>-1</sup> |
| Answer» E. | |
| 12. |
Which of the following is a property of a hard magnetic material? |
| A. | Low hysteresis |
| B. | Low eddy loss |
| C. | Low coercive force |
| D. | High residual induction |
| Answer» E. | |
| 13. |
What is the hysteresis loss of permalloy? |
| A. | 500 |
| B. | 120 |
| C. | 40 |
| D. | 21 |
| Answer» C. 40 | |
| 14. |
The heat treatment of alnico alloys at _____ results in phase separation. |
| A. | 100<sup>o</sup>C |
| B. | 200<sup>o</sup>C |
| C. | 400<sup>o</sup>C |
| D. | 800<sup>o</sup>C |
| Answer» E. | |
| 15. |
What is the relative permeability of iron? |
| A. | 250 |
| B. | 1500 |
| C. | 2700 |
| D. | 100,000 |
| Answer» B. 1500 | |
| 16. |
Which of the following is an example of a soft magnetic material? |
| A. | Permalloy |
| B. | Strontium |
| C. | Alnico |
| D. | Neodymium |
| Answer» B. Strontium | |
| 17. |
The supermaloy primarily composed of ________________ |
| A. | Nickel |
| B. | Iron |
| C. | Cobalt |
| D. | Copper |
| Answer» B. Iron | |
| 18. |
The hysteresis loss in soft magnetic materials must be kept ______ |
| A. | High |
| B. | Minimum |
| C. | Zero |
| D. | Unaltered |
| Answer» C. Zero | |