Metallic Structures Flashcards
What must be done to an aircraft fuel tank before it can be repaired by welding?
The gasoline fumes must all be purged from the tank by running live steam through it for at least 30 minutes, by soaking it in hot water, or filling it with nitrogen or carbon dioxide.
When drilling out rivets on an airplane or drilling holes for a repair, what precaution should be taken?
Do not allow the drill to enter the space behind the structure, as the drill may cause damage to other structures or systems.
What is another name for GTA welding?
TIG welding.
What is used as the electrode in GTA welding?
A small-diameter tungsten wire.
What are three types of power that can be used for GTA welding?
DC-straight polarity, DC-reverse polarity, and AC.
Which type of power provides the greatest heat and deepest penetration in GTA welding?
DC-straight polarity.
Which type of power is used for GTA welding aluminum and magnesium?
DC-reverse polarity.
