MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Which of the following pulses contribute to the desired material removal in EDM? |
| A. | Open circuit pulses |
| B. | Short circuits |
| C. | Arcs |
| D. | Sparks |
| Answer» E. | |
| 2. |
Which components mentioned below are affected due to arcs? |
| A. | Work piece |
| B. | Tool |
| C. | Work piece & Tool |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
When the electrode gap is too small or electrodes are in contact, how much material is removed? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | No material removed |
| Answer» E. | |
| 4. |
Open gap voltages contribute to how much amount of material removal? |
| A. | 20 % |
| B. | 50 % |
| C. | 70 % |
| D. | No contribution |
| Answer» E. | |
| 5. |
State whether the following statement is true or false regarding EDM.“In Electro discharge machining, electric pulses generated affect the material removal.” |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Based on the electrode gap, which of the following electric pulses are generated? |
| A. | Open Circuit pulses |
| B. | Sparks |
| C. | Arcs |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
What is the value of gap maintained between the electrodes when we use servo mechanism? |
| A. | 10 – 100 µm |
| B. | 100 – 200 µm |
| C. | 200 – 500 µm |
| D. | 500 – 1000 µm |
| Answer» D. 500 – 1000 µm | |
| 8. |
Between what values mentioned below, do the discharges and sparks usually vary? |
| A. | 1 and 10,000 |
| B. | 500 and 500,000 |
| C. | 500,000 and 1,000,000 |
| D. | None of the mentioned |
| Answer» C. 500,000 and 1,000,000 | |
| 9. |
What happens when the electron current predominates in the discharge? |
| A. | More anodic removal |
| B. | More cathodic removal |
| C. | Remains same |
| D. | All of the mentioned |
| Answer» B. More cathodic removal | |
| 10. |
Amount of material removed from anode and cathode depend on which of the following? |
| A. | Electrons |
| B. | Positive ions |
| C. | Electrons & Positive ions |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 11. |
The layer formed when unexpelled molten metal solidifies is known as _______________ |
| A. | Reabsorbed layer |
| B. | Recast layer |
| C. | Unevaporated layer |
| D. | Condensed layer |
| Answer» C. Unevaporated layer | |
| 12. |
After the explosion is over, how is the debris carried away? |
| A. | Evaporation |
| B. | Fresh dielectric |
| C. | Old dielectric |
| D. | All of the mentioned |
| Answer» C. Old dielectric | |