Welding Flashcards
What are three types of welding?
Gas, electric arc, and electric resistance welding
What is the purpose of shielding an arc weld with inert gas?
It prevents the atmosphere oxygen/nitrogen from contaminating the weld
What does the size is a torch tip opening determine?
The amount of heat delivered by the torch tip, but not the temperature
How is a soft flame obtained without reducing thermal output?
By using a larger tip and adjusting the pressure
What valve should be turned off first when extinguishing a torch?
The acetylene gas valve
What safety precaution should be taking when gas welding has been completed?
Turn off the valves and relieve all pressure
What is the result of insufficient penetration?
The weld will be weak
What must be done with heat treated aluminum alloys after a welding repair has been made?
It must be reheat treated
Why is it necessary to use flux on all silver soldiering?
To have the base metal, chemically clean without the slightest film of oxide
What type of flame is used for silver soldering?
A neutral flame or slightly reduced inflame
What must be done in the weld zone to successfully weld titanium?
The weld zone must be shielded with inert gas
What procedure will control expansion when welding a joint
TAC welding intervals along the joint
What type of repair could be made for a dented steel tube cluster joint?
A formed steel patch plate over the dented area
What is the preferred method of welding aluminum?
Gas shielded arc welding, also known as TIG welding
What is the preferred method of welding magnesium?
Gas shielded arc welding, also known as TIG welding
What method of welding is likely to cause buckling or warping of thin metal sheets?
TIG welding
What is a safety hazard associated with welding magnesium?
If ignited, it is extremely hard to extinguish
What are some advantages of gas shielded arc welding (TIG welding)?
Stronger weld, more ductile and more corrosion resistant
What must be done to a soldering iron tip to increase the amount of heat transferred from the tip to the work?
The tip must be clean and tinned
What technique might be used to enable a tight fitting inner sleeve to be inserted into a tubular repair?
Chilled the inner tube with dry ice and heat the outer tube with a torch
