MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Powder Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the theoretical amount of copper powder deposited on the cathode plate when a current of 1A passes through the electrolytic tank for 5 minutes? |
| A. | 0.098g |
| B. | 0.0016g |
| C. | 0.190g |
| D. | 0.980g |
| Answer» B. 0.0016g | |
| 2. |
What is the current efficiency when actual weight deposited is 0.036g and theoretical weight deposited is 0.049g? |
| A. | 73.46% |
| B. | 136.11% |
| C. | 73.12% |
| D. | 88.88% |
| Answer» B. 136.11% | |
| 3. |
What is the current density when current of 1.5A flows through the electrolytic cell with the cathode plate having an effective length of 46mm, breadth 38mm and negligible thickness? |
| A. | 413.7 A/m2 |
| B. | 377.9 A/m2 |
| C. | 519.3 A/m2 |
| D. | 403.6 A/m2 |
| Answer» B. 377.9 A/m2 | |
| 4. |
Time and current are the two important variables which affect the amount of powder deposited on the electrode during electrodeposition of copper. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
_____ is used to calculate theoretical weight deposited on the electrode. |
| A. | Faraday’s law |
| B. | Hess law |
| C. | De-Braggs law |
| D. | Stoke’s law |
| Answer» B. Hess law | |
| 6. |
_____ is generally added to the iron sulphate or chloride bath to favor high yield of iron powder. |
| A. | NH4Cl |
| B. | KCl |
| C. | K2SO4 |
| D. | NH3 |
| Answer» B. KCl | |
| 7. |
_______ particle shape is obtained for powders produced from hard, brittle deposits. |
| A. | Dendritic |
| B. | Acicular |
| C. | Angular |
| D. | Irregular |
| Answer» D. Irregular | |
| 8. |
Which of the following is not a characteristic of the electrolytic powder deposit? |
| A. | Low apparent density |
| B. | High apparent density |
| C. | Crystalline |
| D. | Dendritic shape |
| Answer» C. Crystalline | |
| 9. |
Which of the following metal powder is generally not prepared by fused salt electrolysis? |
| A. | Copper |
| B. | Tantalum |
| C. | Vanadium |
| D. | Thorium |
| Answer» B. Tantalum | |
| 10. |
Which of the following factors does not promote powdery deposits? |
| A. | Low temperature |
| B. | High-current-density |
| C. | High-metal concentration |
| D. | High viscosity |
| Answer» D. High viscosity | |
| 11. |
Ta powder is produced commercially by electrolysis of ______ dissolved in a bath of K2TaF7, KCl, and KF. |
| A. | Tantalum oxide |
| B. | Tantalum sulphate |
| C. | Tantalum chloride |
| D. | Tantalum fluoride |
| Answer» B. Tantalum sulphate | |
| 12. |
In electrodeposition, the final product may be obtained in ____ different forms. |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 5 |
| Answer» C. 2 | |