MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Aerospace Materials and Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The voltage in the Hall-Heroult process is around __________ |
| A. | 2-9 V |
| B. | 15.5-16.5 V |
| C. | 26-45 V |
| D. | 6-8 V |
| Answer» E. | |
| 2. |
The Hall-Heroult process produces around _______ pure aluminium. |
| A. | 100% |
| B. | 20% |
| C. | 98% |
| D. | 4% |
| Answer» D. 4% | |
| 3. |
Cryolite cannot be used in the Hall-Heroult process of smelting aluminium. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The Hall-Heroult process is carried out at a temperature of __________ industrially. |
| A. | 940-980 C |
| B. | 200-300 C |
| C. | 10,000-50,000 C |
| D. | 50-70 C |
| Answer» B. 200-300 C | |
| 5. |
The Hall-Heroult process is used for ___________ aluminium. |
| A. | breaking |
| B. | distributing |
| C. | smelting |
| D. | mixing |
| Answer» D. mixing | |
| 6. |
Aluminium ores can be obtained in large amounts from which of the following countries? |
| A. | Africa, Greenland |
| B. | Africa, Australia |
| C. | Greenland |
| D. | Australia |
| Answer» C. Greenland | |
| 7. |
Aluminium can be extracted using electrometallurgy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Hydrometallurgy is the process of extracting __________ from ___________ |
| A. | flight parts, metals |
| B. | metals, flight parts |
| C. | metals, ores |
| D. | ores, metals |
| Answer» D. ores, metals | |
| 9. |
Recycling of aluminium requires _________ of energy to make new aluminium. |
| A. | 0.5% |
| B. | 25% |
| C. | 5% |
| D. | 50% |
| Answer» D. 50% | |
| 10. |
Which of the following is a chemical process used to extract aluminium? |
| A. | Osmosis |
| B. | Radiography |
| C. | Heliography |
| D. | Pyrometallurgy |
| Answer» E. | |