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. |
At the end of pulse, super-heated metal evaporates _______________ |
| A. | Explosively |
| B. | Normally |
| C. | Periodically |
| D. | Occasionally |
| Answer» B. Normally | |
| 2. |
What are the values of pressure of the plasma in EDM? |
| A. | Up to 2 atm |
| B. | Up to 20 atm |
| C. | Up to 200 atm |
| D. | Up to 2000 atm |
| Answer» D. Up to 2000 atm | |
| 3. |
State whether the following statement is true or false about material removal in EDM.“In EDM, high pressures allow the metal to evaporate.” |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
What is the duration of sparks that are produced in Electro discharge machining? |
| A. | 0.001 – 1 µs |
| B. | 0.1 – 2000 µs |
| C. | 0.2 – 100 ms |
| D. | 100 – 2000 ms |
| Answer» C. 0.2 – 100 ms | |
| 5. |
What range of heat fluxes are obtained while machining using EDM? |
| A. | 1017 W/m2 |
| B. | 1019 W/m2 |
| C. | 1024 W/m2 |
| D. | 1027 W/m2 |
| Answer» B. 1019 W/m2 | |
| 6. |
What are the values of temperature that are obtained while machining using EDM? |
| A. | 2000 to 3000ᵒC |
| B. | 4000 to 6000ᵒC |
| C. | 8000 to 12000ᵒC |
| D. | 15000 to 20000ᵒC |
| Answer» D. 15000 to 20000ᵒC | |
| 7. |
State whether the following statement is true or false regarding EDM.“In EDM, negative ions (electrons) collide with positive ions to generate heat.” |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
What is the radius of channel, when electrical breakdown occur? |
| A. | 4 µm |
| B. | 6 µm |
| C. | 8 µm |
| D. | 10 µm |
| Answer» E. | |
| 9. |
How is material removed in Electro discharge machining? |
| A. | Melt and evaporate |
| B. | Corrode and break |
| C. | Mechanical erosion takes place |
| D. | None of the mentioned |
| Answer» B. Corrode and break | |
| 10. |
What are the values of gaps between the electrodes in EDM? |
| A. | 0.001 – 0.05 mm |
| B. | 0.01 – 0.5 mm |
| C. | 0.1 – 5 mm |
| D. | 1 – 15 mm |
| Answer» C. 0.1 – 5 mm | |
| 11. |
What are the magnitude of voltages used in Electro discharge machining? |
| A. | 1 to 20 V |
| B. | 20 to 120 V |
| C. | 120 to 220 V |
| D. | 220 to 320 V |
| Answer» C. 120 to 220 V | |
| 12. |
What is the value of order of frequency applied between the two electrodes in EDM? |
| A. | 1 kHz |
| B. | 3 kHz |
| C. | 5 kHz |
| D. | 7 kHz |
| Answer» D. 7 kHz | |