WELDING TECHNIQUES - Practice Mode

1) Which of the following gas is used in TIG welding?
Correct Answer: Helium
2) Which of the accessories should be worn during overhead welding?
Correct Answer: Helmet
3) Which one of the following do not assist fire?
Correct Answer: Nitrogen
4) Which type of polarity is used in aluminium welding?
Correct Answer: Reverse polarity
5) What is polarity?
Correct Answer: Direction of current