MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Lasers tend to have fairly low energy conversion efficiency. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Which of the following material properties has no effect on laser beam machining? |
| A. | Reflectivity |
| B. | Thermal conductivity |
| C. | Weldability |
| D. | Electrical conductivity |
| Answer» E. | |
| 3. |
Weld penetrations of larger than _____ are difficult to weld by LBW. |
| A. | 5 mm |
| B. | 13 mm |
| C. | 19 mm |
| D. | 25 mm |
| Answer» D. 25 mm | |
| 4. |
Aspect ratios, i.e., depth-to-width ratios of the order of _____ are attainable by LBW. |
| A. | 1:2 |
| B. | 5:10 |
| C. | 10:1 |
| D. | 15:1 |
| Answer» D. 15:1 | |
| 5. |
Laser welds are not influenced by _____ |
| A. | electric field |
| B. | magnetic field |
| C. | radio waves |
| D. | ultraviolet rays |
| Answer» C. radio waves | |
| 6. |
Which of the following does not hold true about laser beam welding? |
| A. | Laser welding cannot be used in case of joints at intricate locations |
| B. | It can produce tiny welds |
| C. | Laser welding can be used for a variety of metal combinations |
| D. | In case of LBW, thin welds on small diameter wires are less susceptible to burn back |
| Answer» B. It can produce tiny welds | |
| 7. |
Laser welding is performed with freedom from electrode contamination. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following holds true about laser welding process? |
| A. | Time for welding thick sections is more in case of LBW |
| B. | Shielding gas is used to melt the burr formed during the machining |
| C. | In LBW, sometimes filler metals are used |
| D. | In Nd- YAG lasers, crystals of C14 are used as the lasing material |
| Answer» D. In Nd- YAG lasers, crystals of C14 are used as the lasing material | |
| 9. |
In case of laser welding, heat input is _____ to fuse the weld metal. |
| A. | equal to the required amount |
| B. | close to the minimum required |
| C. | greater by 200 J than required |
| D. | approximately higher by atleast 320 J |
| Answer» C. greater by 200 J than required | |
| 10. |
In transverse flow type gas lasers, gas is circulated across _____ |
| A. | the resonator cavity axis |
| B. | optical axis |
| C. | deflection coils |
| D. | the focusing lens |
| Answer» B. optical axis | |
| 11. |
Fast axial flow gas lasers are available between _____ watts power levels. |
| A. | 10-100 |
| B. | 50-500 |
| C. | 500-6000 |
| D. | 6000-7000 |
| Answer» D. 6000-7000 | |
| 12. |
______ is used to circulate the laser gas in case of fast axial flow gas laser. |
| A. | Compressor |
| B. | Turbo pump |
| C. | Guide vanes |
| D. | Vane pump |
| Answer» C. Guide vanes | |