WELDING 4 TIG AND CO2 WELDING - Quiz

1) What is the defect caused by air mixed with gas in CO₂ welding?

Over lap Blow hole Incomplete penetration Excess wide bead

2) What is the cause for excessive wide bead while welding in CO₂ process?

in adequate gas flow welding current too low too small dia of nozzle welding speed too low

3) What is the defect caused by high current and low voltage in GMAW process?

Spatter Undercut Incomplete fusion Crack on base metal

4) What is the remedy for incomplete fusion of weld in GMAW process?

Dirty weld joint Too long cable Improper welding angle Correct the root dimension

5) What is the remedy to prevent the air contamination in weld by GMAW process?

Connect the gas regulator Increase the length of gas pipe Inert gas backing Reduce flow rate of gas