10) Which gas is generated during GMAW on using CO₂ as shielding gas?

11) What type of lens shade is to be fixed in helmet while doing MIG welding?

12) What is the lens shade fitted in a helmet as per the recommendation of welding code for setting of 150 Amps for MMAW?

13) Which type of apron is suitable to protect from heat and radiation during welding?

14) Which angle of pre setting is to compensate distortion on horizontal single V butt joint metal thickness 10 mm and root gap 2mm ?