MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Advanced Machining knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
WHAT_MUST_BE_THE_WORKING_VOLTAGE_IN_ELECTROCHEMICAL_MACHINING??$ |
| A. | 10 V |
| B. | 20 V |
| C. | 30 V |
| D. | 40 V |
| Answer» C. 30 V | |
| 2. |
For a better surface finish, which type of current distribution is required?$ |
| A. | Even |
| B. | Uneven |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» B. Uneven | |
| 3. |
Surface roughness depend on which of the following quantities?$ |
| A. | Crystallographic irregularities |
| B. | Alloy composition |
| C. | Distribution of current density |
| D. | All of the mentioned |
| Answer» E. | |
| 4. |
In Electrochemical machining, larger grain size causes which type of finish? |
| A. | Smoother |
| B. | Rougher |
| C. | Finer |
| D. | All of the mentioned |
| Answer» C. Finer | |
| 5. |
Between which values does the side gap’s surface roughness vary?$ |
| A. | >1 µm |
| B. | >3 µm |
| C. | >5 µm |
| D. | >7 µm |
| Answer» D. >7 ¬¨¬®¬¨¬µm | |
| 6. |
Between which values does the frontal gap’s surface roughness vary?$ |
| A. | 0.02 to 0.13 µm |
| B. | 0.30 to 1.90 µm |
| C. | 1.93 to 2.64 µm |
| D. | 2.73 to 4.26 µm |
| Answer» C. 1.93 to 2.64 ¬¨¬®¬¨¬µm | |
| 7. |
What is the value of moderate level of pH of electrolyte used? |
| A. | 1 – 2 |
| B. | 2 – 4 |
| C. | 4 – 10 |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 8. |
In practice, what must be the temperature of electrolyte used in ECM? |
| A. | 10 – 20<sup>o</sup>C |
| B. | 20 – 40<sup>o</sup>C |
| C. | 60 – 80<sup>o</sup>C |
| D. | 80 – 100<sup>o</sup>C |
| Answer» D. 80 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 100<sup>o</sup>C | |
| 9. |
State whether following statement is true or false about electrolyte in ECM. |
| A. | |
| B. | True |
| Answer» B. True | |
| 10. |
When machining Ti, in Nacl electrolyte, what values of current efficiencies are obtained? |
| A. | 10 – 20 % |
| B. | 20 – 30 % |
| C. | 30 – 50 % |
| D. | 50 – 80 % |
| Answer» B. 20 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 30 % | |
| 11. |
When the electrolyte flow is low, what happens to the current efficiency? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | Increase and then decrease |
| Answer» C. Remains same | |
| 12. |
Nickel can be machined with 100% current efficiency, when current density value is _____. |
| A. | 10 A/cm<sup>2</sup> |
| B. | 25 A/cm<sup>2</sup> |
| C. | 45 A/cm<sup>2</sup> |
| D. | 80 A/cm<sup>2</sup> |
| Answer» C. 45 A/cm<sup>2</sup> | |
| 13. |
For alloys, which type of electrolyte is used in ECM? |
| A. | Single component |
| B. | Double component |
| C. | Multi component |
| D. | Triple component |
| Answer» D. Triple component | |
| 14. |
Better surface finish and higher accuracy depend on which of the factors below? |
| A. | Chemical composition of electrolyte |
| B. | Current density |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 15. |
Electro chemical dissolution phase starts with the movement of ions between which two components? |
| A. | Cathode and anode |
| B. | Cathode and power source |
| C. | Power source and anode |
| D. | Power source and electrolyte |
| Answer» B. Cathode and power source | |