GAS TUNGSTEN ARC WELDING - Quiz

1) Why argon gas is used in welding of stainless steel welding in TIG welding process?

Inert gas protects the weld It helps in melting the electrode It prevents porosity It is cheap

2) Which welding machine is to be used for welding of aluminium by TIG welding process?

AC welding machine DC welding machine AC DC transformer DC transformer

3) What is the defect caused by high current in TIG welding?

Crack Porosity Under cut Lack of penetration

4) What is the defect while TIG welding if the current is too low?

Crack Porosity Under cut Lack of fusion

5) What is right about DCRP electrode TIG welding ?

Improper tungsten size Improper shielding gas flow Improperly prepared tungsten Weld circuit polarity is incorrect