WELDING AND HEAT TREATMENT - Practice Mode

1) Which type of thread is used in acetylene gas cylinder?
Correct Answer: Left hand thread
2) Which one is the heat treatment process?
Correct Answer: Annealing
3) What is the purpose of hardening?
Correct Answer: Increase strength
4) What is the advantage of AC arc welding machine?
Correct Answer: Freedom from arc blow
5) What is the advantage of using rectifier set in arc welding machine?
Correct Answer: Suitable for all ferrous and non-ferrous