MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 18 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 are the values of power densities used in the EBM process? |
| A. | 0.05 MW/mm2 |
| B. | 0.55 MW/mm2 |
| C. | 1.55 MW/mm2 |
| D. | 2.55 MW/mm2 |
| Answer» D. 2.55 MW/mm2 | |
| 2. |
What are the values of velocity maintained in the EBM process? |
| A. | 118 x 103 m/s |
| B. | 228 x 103 m/s |
| C. | 338 x 103 m/s |
| D. | 448 x 103 m/s |
| Answer» C. 338 x 103 m/s | |
| 3. |
Which of the following lenses are used for refocussing the electrons in EBM process? |
| A. | Magnetic lens |
| B. | Electronic lens |
| C. | Magnetic & Electronic lens |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
WHICH_OF_THE_FOLLOWING_LENSES_ARE_USED_FOR_REFOCUSSING_THE_ELECTRONS_IN_EBM_PROCESS??$ |
| A. | Magnetic lens |
| B. | Electronic lens |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
What are the values of power densities used in the EBM process?$ |
| A. | 0.05 MW/mm<sup>2</sup> |
| B. | 0.55 MW/mm<sup>2</sup> |
| C. | 1.55 MW/mm<sup>2</sup> |
| D. | 2.55 MW/mm<sup>2</sup> |
| Answer» D. 2.55 MW/mm<sup>2</sup> | |
| 6. |
What are the values of velocity maintained in the EBM process?$ |
| A. | 118 x 10<sup>3</sup> m/s |
| B. | 228 x 10<sup>3</sup> m/s |
| C. | 338 x 10<sup>3</sup> m/s |
| D. | 448 x 10<sup>3</sup> m/s |
| Answer» C. 338 x 10<sup>3</sup> m/s | |
| 7. |
What are the values of the cavity diameters that are obtained in EBM? |
| A. | 15 to 20 µm |
| B. | 20 to 25 µm |
| C. | 30 to 35 µm |
| D. | 35 to 40 µm |
| Answer» E. | |
| 8. |
What are the values of material removal rates in EBM process? |
| A. | 1 mm<sup>3</sup>/min |
| B. | 10 mm<sup>3</sup>/min |
| C. | 100 mm<sup>3</sup>/min |
| D. | 1000 mm<sup>3</sup>/min |
| Answer» C. 100 mm<sup>3</sup>/min | |
| 9. |
What is the frequency of the pulse of electrons used in EBM process? |
| A. | 10 Hz |
| B. | 10<sup>2</sup> Hz |
| C. | 10<sup>3</sup> Hz |
| D. | 10<sup>4</sup> Hz |
| Answer» E. | |
| 10. |
What are the values of voltages used in the EBM process? |
| A. | 10 V |
| B. | 50 V |
| C. | 150 V |
| D. | 200 V |
| Answer» D. 200 V | |
| 11. |
Emission current depends up on which of the following factors? |
| A. | Cathode material |
| B. | Temperature |
| C. | Voltage supply |
| D. | All of the mentioned |
| Answer» E. | |
| 12. |
What are the values of current densities used in the process of EBM? |
| A. | 5 and 15 A/cm<sup>2</sup> |
| B. | 15 and 20 A/cm<sup>2</sup> |
| C. | 20 and 30 A/cm<sup>2</sup> |
| D. | 40 and 60 A/cm<sup>2</sup> |
| Answer» B. 15 and 20 A/cm<sup>2</sup> | |
| 13. |
What are the values of currents used in EBM process? |
| A. | 1 and 20 mA |
| B. | 20 and 100 mA |
| C. | 100 and 200 mA |
| D. | 200 and 400 mA |
| Answer» C. 100 and 200 mA | |
| 14. |
The tungsten filament cathode is heated to what temperatures in EBM? |
| A. | 1000 to 1500 ᵒC |
| B. | 1500 to 2000 ᵒC |
| C. | 2500 to 3000 ᵒC |
| D. | 3500 to 5000 ᵒC |
| Answer» D. 3500 to 5000 ¬¨‚à묨¬µ‚àö‚â†C | |
| 15. |
Which of the following are the applications of EBM process? |
| A. | Drilling |
| B. | Cutting |
| C. | Engraving |
| D. | All of the mentioned |
| Answer» E. | |
| 16. |
When did the Electron beam machining come into the machining industry? |
| A. | 1920s |
| B. | 1930s |
| C. | 1950s |
| D. | 1960s |
| Answer» E. | |
| 17. |
The prototype of the machine used in EBM process was first introduced in which year? |
| A. | 1924 |
| B. | 1943 |
| C. | 1947 |
| D. | 1956 |
| Answer» D. 1956 | |
| 18. |
What is the full form of EBM in the advanced machining processes? |
| A. | Electro blast manufacturing |
| B. | Electron beam machining |
| C. | Electron beam manufacturing |
| D. | Electron blast manufacturing |
| Answer» C. Electron beam manufacturing | |