Name the three types of welding
Gas, electric arc, electric resistance
What are some advantages of shielded gas arc welding?
The weld is stronger, more ductile, and more corrosion resistant
Which method of welding is less likely to cause buckling or warping of thin metal sheets?
Electric arc (TIG) welding
What is the purpose of shielding an arc weld with an inert gas?
The gas prevents oxygen or nitrogen from contaminating the weld
What is a common method of controlling expansion when welding a joint?
Place tack welds along the length of the joint
What is the effect of inadequate penetration on a weld?
Weld will be weak
What is the purpose of the flux used with brazing and silver soldering
The flux cleans the base metal by removing any oxide film
What type of flame is used when torch brazing or silver soldering?
What must be done to a soldering iron tip to increase the amount of heat transferred from the tip to the work?
Tip must be cleaned of contaminates and tinned
What is the preferred method for welding aluminum?
Tungsten Inert Gas (TIG)
What is the preferred method of welding magnesium?
What precautions must be observed in order to weld titanium?
All traces of oxygen and nitrogen must be kept away from the weld area
Describe one type of repair that could be made to a dented steel tube cluster joint
A formed steel patch plate could be welded over the damaged area
How can a soft flame be obtained without reducing the heat output of the torch?
Use a larger tip and adjust the gas pressure accordingly
What factors determine the amount of heat delivered by a gas welding torch?
The size of the torch tip and gas pressure
When an oxyacetylene torch is extinguished, which valve is turned off first?
When a gas welding project is completed, what safety precautions should be accomplished?
All the valves turned off and the pressures relieved
What should be done to a heat treated aluminum part after welded repairs are completed?
The part must be re heat-treated
Welding magnesium can create a serious safety hazard. What is the nature of this hazard?
Magnesium burns with a very hot flame that is very hard to extinguish.
What technique might be used to enable a tight-fitting inner sleeve to be inserted into a tubular repair?
The inner tube could be chilled with dry ice or in a freezer while the outer tube could be heated slightly with a torch.