NOCTI WELDING TEST QUESTIONS AND ANSWERS

What does GMAW stand for - Answer-Gas Metal Arc Welding GMAW is generally done with what polarity? - Answer-Direct current electrode positive (DC+) What type of power source is generally used for GMAW welding - Answer-Constant Voltage What does E stand for in ER70S-6 - Answer-electrode What does "70" stand for in ER70S-3? - Answer-tensile strength What mode of metal transfer allows for only flat/horizontal position GMAW welding - Answer-Spray What gas mixture is generally associated with spray transfer on steel? - Answer-80% AR/ 20% CO2 What gas mixture is generally associated with globular transfer on steel? - Answer-90% AR/ 10%CO2 Inadequate gas flow can cause what defect in GMAW welding? - Answer-Porosity What is generally not an effect of a worn or loose contact tip - Answer-porosity What does STT stand for? - Answer-Surface Tension Transfer What type of arc transfer is associated with STT? - Answer-short circuit Cold lap or lack of fusion is generally associated with what type of arc transfer - Answer-Short Circuit What does the s stand for in the GMAW classification for ER70S-6 - Answer-Solid What mode of metal transfer allows for consistent all position GMAW welding - Answer-Short Circuit What gas mixture is generally associated with pulse transfer on steel? - Answer-90% AR/ 1