Tig welding is a gas-arc welding process using an inert gas to protect the weld zone from the atmosphere. The heat for welding is a very intense electric arc which is struck between a non-consumable tungsten electrode and work piece.
Tig welding is more complex than regular arc welding. More emphasis is placed on the technology of metals. The student should be competent in arc welding and gas welding, and have knowledge of metals, their properties and characteristics.
Note: No minimum placement test required.