WELDING 4 TIG AND CO2 WELDING - Quiz

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

By air By flux By electrode By shielding gas CO₂

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

Enable flow to regulator Avoid ice forming of CO₂ Connect to flow meter Improve flow of gas

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

90% Helium 10% Argon 90% Helium 25% Argon 75% Helium 10% Argon 75% Helium 25% Argon

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

Argon Helium Helium - Argon Argon - Oxygen

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

100 Degree - 120 Degree Centigrade 160 Degree - 180 Degree Centigrade 180 Degree - 205 Degree Centigrade 200 Degree - 220 Degree Centigrade