MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
CO2_LASERS_EMPLOYS_GAS_MIXTURE_OF______?$ |
| A. | nitrogen and helium |
| B. | hydrogen and helium |
| C. | argon and xenon |
| D. | oxygen and nitrogen |
| Answer» B. hydrogen and helium | |
| 2. |
How many categorize are there of CO2 lasers?$ |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 3. |
Gas_heating_produced_by_gas_lasers_is_controlled_by______$ |
| A. | coolant |
| B. | a blow of cool air |
| C. | adjusting the wavelength of the laser |
| D. | circulating the gas mixture |
| Answer» E. | |
| 4. |
Solid axial flow CO2 lasers can generate laser beams with a constant rating of 80 Watts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Slow_axial_flow_gas_lasers_are_simplest_of_the_CO2_lasers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following laser is the most efficient? |
| A. | CO<sub>2</sub> lasers |
| B. | Nd-YAG lasers |
| C. | Ruby lasers |
| D. | Dye lasers |
| Answer» B. Nd-YAG lasers | |
| 7. |
The lasing material or crystal is excited by _____ |
| A. | neon lamps |
| B. | krypton lamps |
| C. | tungsten wire laps |
| D. | CFLs |
| Answer» C. tungsten wire laps | |
| 8. |
The lasing material is a cylinder of a diameter of about _____ mm. |
| A. | 5 |
| B. | 9 |
| C. | 17 |
| D. | 20 |
| Answer» C. 17 | |
| 9. |
In solid state laser _____ is used as a dopant. |
| A. | actinium ion |
| B. | neodymium ion |
| C. | platinum ion |
| D. | lead ion |
| Answer» C. platinum ion | |
| 10. |
Which of the following is a commercially used laser? |
| A. | Nd-GAG laser |
| B. | 1.06 µm wavelength CO<sub>2</sub> laser |
| C. | 2 µm wavelength CO<sub>2</sub> laser |
| D. | Nd- YAS laser |
| Answer» C. 2 ¬¨¬®¬¨¬µm wavelength CO<sub>2</sub> laser | |
| 11. |
Inert gas shielding is generally employed to protect _____ |
| A. | laser beam |
| B. | molten puddle of metal |
| C. | filler electrode |
| D. | lenses |
| Answer» C. filler electrode | |
| 12. |
Which of the following is used to direct laser beam? |
| A. | glass apertures |
| B. | perforated glass sheets |
| C. | flat optical elements |
| D. | electro-magnetic coils |
| Answer» D. electro-magnetic coils | |
| 13. |
Laser beam welding is a ______ joining process. |
| A. | fission |
| B. | fusion |
| C. | coherent |
| D. | plastic |
| Answer» C. coherent | |