Welding - 4. TIG and CO2 Welding MCQ with Answers

Welding - 4. TIG and CO2 Welding MCQ with Answers

6) How the molten puddle is protected against atmospheric oxygen and nitrogen while using bare electrode in MAG welding?

Answer is:

By shielding gas CO₂

7) What is the purpose of inlet end of heater connected to gas cylinder in CO₂ welding?

Answer is:

Avoid ice forming of CO₂

8) Which gas mixture is used in GMAW spray transfer for 25 - 76 mm thick Aluminium block?

Answer is:

75% Helium 25% Argon

9) What is the gas mixture used for copper, nickel and alloys of heavier gauge thickness in GMAW spray transfer?

Answer is:

Helium - Argon

10) What is the normal preheating temperature for Aluminium Welding by TIG process?

Answer is:

180 Degree - 205 Degree Centigrade