Gas Metal Arc Welding (GMAW) (MIG Welding) All Possible Questions and Answers with complete solution

1. Define and describe the GMAW process in detail. Correct Answer: Joins metal by heating them with electric arc established between a continuously fed filler metal electrode and the workpiece. 2. The gas metal arc welding process is also known as: Correct Answer: a) MIG Welding 3. GMAW is recommended for use on which of the following metals? Correct Answer: e) All of the above 4. List the basic equipment components required for the set-up of GMAW outfit. Correct Answer: Volts and wire speed 5. How will penetration be affected when stickout is increased? Correct Answer: c) Will decrease penetration 6. Changing the gun inclination will: Correct Answer: a) Change the penetration of the weld and/or d) Cause the wire to feed unevenly 7. Describe how GMAW equipment is likely to behave when the contact tip is worn out. Correct Answer: Cause gas flow turbulence, resulting in porosity and poor quality welds. 8. Excessive splatter build up in the gun nozzle can cause: Correct Answer: d) Inadequate gas coverage9. Moisture and dirt on the surface of the wire electrode is likely to cause: Correct Answer: a) Porosity 10. Excessive drag from a dirty liner is likely to cause: Correct Answer: d) Damage to the liner and contact tip