MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In laser beam machining process lens is used to |
| A. | Deflect laser beams |
| B. | Diverge laser beams |
| C. | Converge laser beams |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 2. |
Time of cutting in laser beam machining process increases |
| A. | With decrease in cutting speed |
| B. | With Increase in Cutting speed |
| C. | With increase in power |
| D. | None of the mentioned |
| Answer» B. With Increase in Cutting speed | |
| 3. |
In laser beam machining process, as compared to other unconventional machining processes, heat affected zone is |
| A. | Larger |
| B. | Smaller |
| C. | Not present |
| D. | None of the mentioned |
| Answer» C. Not present | |
| 4. |
Laser beam machining process can be used for |
| A. | Conductors |
| B. | Insulators |
| C. | Metals |
| D. | All of the mentioned |
| Answer» E. | |
| 5. |
Time of machining in the laser beam machining process increases with |
| A. | Decrease in power supply |
| B. | Decrease in laser beam spot diameter |
| C. | Increase in cutting speed |
| D. | None of the mentioned |
| Answer» C. Increase in cutting speed | |
| 6. |
Ruby laser is most efficient when |
| A. | Kept cold |
| B. | Kept hot |
| C. | Kept at normal temperature |
| D. | None of the mentioned |
| Answer» B. Kept hot | |
| 7. |
LASER stands for |
| A. | Light amplification by stimulated emission of radiation |
| B. | Light amplification by stimulated erosion of reaction |
| C. | Light amplification by stimulated erosion of radiation |
| D. | Light amplification by stimulated emission of reaction |
| Answer» B. Light amplification by stimulated erosion of reaction | |
| 8. |
THE_ELECTRONS_AT_GROUND_STATE_CAN_BE_EXCITED_TO_A_HIGHER_STATE_OF_ENERGY_BY______?$ |
| A. | increasing the pressure |
| B. | lowering the energy |
| C. | absorbing the energy |
| D. | oxidising the atom |
| Answer» D. oxidising the atom | |
| 9. |
The_geometry_and_radii_of_orbital_paths_of_electrons_depend_on_the_presence_of_an_electromagnetic_field.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
At _____ temperature an atom is considered to be at ground level? |
| A. | absolute zero |
| B. | 0<sup>o</sup>C |
| C. | 100<sup>o</sup>C |
| D. | 100 K |
| Answer» B. 0<sup>o</sup>C | |
| 11. |
Laser causes a rapid substantial rise in _____ of the material. |
| A. | local temperature |
| B. | local pressure |
| C. | indentation |
| D. | cracks |
| Answer» B. local pressure | |
| 12. |
Laser beams can have power density upto _____ |
| A. | 1 kW/mm<sup>2</sup> |
| B. | 10 kW/mm<sup>2</sup> |
| C. | 1 MW/mm<sup>2</sup> |
| D. | 10 MW/mm<sup>2</sup> |
| Answer» D. 10 MW/mm<sup>2</sup> | |
| 13. |
Laser stands for light amplification by stimulated emission of radiation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Lasers are also used for_____ |
| A. | riveting |
| B. | nitriding |
| C. | rapid prototyping |
| D. | facing |
| Answer» D. facing | |
| 15. |
Which of the following processes does not use lasers? |
| A. | Cladding |
| B. | Alloying |
| C. | Nitriding |
| D. | Cutting |
| Answer» D. Cutting | |
| 16. |
Laser Beam is produced due to _____ |
| A. | spontaneous emission |
| B. | stimulated emission followed by spontaneous emission |
| C. | spontaneous emission followed by Spontaneous absorption |
| D. | spontaneous absorption leading to “population inversion” and followed by stimulated emission |
| Answer» E. | |
| 17. |
Mechanism of material removal in Laser Beam Machining is due to _____ |
| A. | mechanical erosion due to impact of high of energy photons |
| B. | electro-chemical etching |
| C. | melting and vaporisation due to thermal effect of impingement of high energy laser beam |
| D. | fatigue failure |
| Answer» D. fatigue failure | |