McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Manufacturing Engineering .
Chapters
| 1. |
Inwhichwelding the surfacesoftwo components are subjected to static normalforce and oscillating shear stress? |
| A. | Diffusion welding |
| B. | Thermit welding |
| C. | Laser beam welding |
| D. | Ultrasonic welding |
| Answer» D. Ultrasonic welding | |
| 2. |
Electron beam welding is carried out in? |
| A. | Inert atmosphere |
| B. | Partially filled chamber |
| C. | Vacuum |
| D. | Partially vacuum |
| Answer» C. Vacuum | |
| 3. |
Laser beam weldingis a joining process. |
| A. | fission |
| B. | fusion |
| C. | coherent |
| D. | plastic |
| Answer» B. fusion | |
| 4. |
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» C. flat optical elements | |
| 5. |
Inert gas shielding is generally employed to protect _____ |
| A. | laser beam |
| B. | molten puddle of metal |
| C. | filler electrode |
| D. | lenses |
| Answer» B. molten puddle of metal | |
| 6. |
The lasing material or crystal is excited by _____ |
| A. | neon lamps |
| B. | krypton lamps |
| C. | tungsten wire laps |
| D. | CFLs |
| Answer» B. krypton lamps | |
| 7. |
Which ofthe following does not holdtrue aboutlaserbeamwelding? |
| A. | Laser welding cannot be used in case ofjoints atintricate locations |
| B. | It can produce tiny welds |
| C. | Laser welding can be used for avariety of metal combinations |
| D. | In case of LBW, thin welds on small diameter wires are less susceptible to burn back |
| Answer» A. Laser welding cannot be used in case ofjoints atintricate locations | |
| 8. |
Laser welds are not influenced by _____ |
| A. | electric field |
| B. | magnetic field |
| C. | radio waves |
| D. | ultraviolet rays |
| Answer» B. magnetic field | |
| 9. |
Which of the following material properties has no effect on laser beam machining? |
| A. | Reflectivity |
| B. | Thermal conductivity |
| C. | Weldability |
| D. | Electrical conductivity |
| Answer» D. Electrical conductivity | |
| 10. |
In oxy-acetylene welding colour of oxygen cylinder is |
| A. | Red |
| B. | Maroon |
| C. | Black |
| D. | Brown |
| Answer» C. Black | |
| 11. |
In oxy-acetylene welding colour of oxygen cylinder is |
| A. | Red |
| B. | Maroon |
| C. | Black |
| D. | Brown |
| Answer» B. Maroon | |
| 12. |
In arc welding, arc initiation voltage is of the order |
| A. | 20-60V |
| B. | 60-100V |
| C. | 100-140V |
| D. | 140-180V |
| Answer» B. 60-100V | |
| 13. |
In arc welding, the three elements to be controlled to obtain satisfactory welding operation are |
| A. | Current, voltage and speed of travel |
| B. | Current, voltage and arc length |
| C. | Current, arc length and speedoftravel |
| D. | Voltage, arc length and speed oftravel |
| Answer» A. Current, voltage and speed of travel | |
| 14. |
Which welding process is used to join two thick plates in one single pass? |
| A. | Oxy-acetylene welding |
| B. | Gas tungsten arc welding (TIG) |
| C. | Gas metal arc welding (MIG) |
| D. | Electroslag welding |
| Answer» D. Electroslag welding | |
| 15. |
The followingwelding process is usedtoweldfastener to plateswithout drillingorpunching holes? |
| A. | Electroslag welding |
| B. | Oxy-acetylene welding |
| C. | Butt welding |
| D. | Stud welding |
| Answer» D. Stud welding | |
| 16. |
The process which employ an exothermal chemical reaction to develop high temperature |
| A. | Electroslag welding |
| B. | Plasmaarcwelding |
| C. | Thermit welding |
| D. | Stud welding |
| Answer» C. Thermit welding | |
| 17. |
Which process allows fusion welds of great depth with minimum width? |
| A. | Electron beam welding |
| B. | Ultrasonic welding |
| C. | Plasma arc welding |
| D. | Friction welding |
| Answer» A. Electron beam welding | |
| 18. |
The process of carbon arc welding is not used for which of the following material? |
| A. | Copper |
| B. | Bronze |
| C. | Aluminium |
| D. | Iron |
| Answer» D. Iron | |
| 19. |
The distance from the center of arc to the tip of electrode is called what? |
| A. | Arc distance |
| B. | Arc length |
| C. | Arccrater |
| D. | Arcdepth |
| Answer» B. Arc length | |
| 20. |
What is the length of the arc generally? |
| A. | 1mm –2mm |
| B. | 2mm –3mm |
| C. | 3mm – 4mm |
| D. | 4mm – 5mm |
| Answer» C. 3mm – 4mm | |
| 21. |
With an increase in the heatinput of arcwelding method, how does it affectthewelding speed? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | No relation |
| Answer» B. Decreases | |
| 22. |
With an increase in the heatinput of arc welding method, how does it affectthe required current? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | No relation |
| Answer» A. Increases | |
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