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19 Cards in this Set
- Front
- Back
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Name the three principal types of welding |
Gas welding, electric arc welding, and electric resistance welding |
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What are some advantages of gas shielded arc welding? |
The weld is stronger, more ductile, and more corrosion resistant |
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Which method of welding is less likely to cause buckling or warping of thin metal sheets? |
Electric Arc or TIG welding |
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What is the purpose of shielding in an arc weld with an inert gas? |
The gas prevents atmospheric oxygen and/ or nitrogen from contaminating the weld |
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What is a common method of controlling expansion when welding a joint? |
Place tack welds along the length of the joint |
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What is the effect of inadequate penetration on a weld? |
The weld will be week |
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What is the purpose of the flux used when brazing and silver soldering? |
The flux cleans the base metal by removing any oxide film |
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What type of flame is used when a torch brazing or silver soldering? |
A neutral flame |
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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 cleaned of all contaminants and properly tinned |
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What is the preferred method for welding aluminum? |
Tungsten inert gas for TIG welding |
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What precautions must be observed in order to weld titanium? |
All traces of oxygen and nitrogen must be kept away from the weld area |
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Describe one type of repair that could be made to a dented steel to cluster joint |
A formed steel patch plate could be welded over the damaged area |
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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 |
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What factors determine the amount of heat delivered by a gas welding torch? |
The size of the torch tip and the gas pressure |
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When an oxy acetylene torch is extinguished which valve is turned off first? |
Turn off the acetylene gas valve first |
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When the gas welding project is completed, what safety precaution should be accomplished? |
All the valves are turned off and the gas pressures are relieved |
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What should be done to a heat treated aluminum part after welded repairs are completed? |
The part must be re heat treated |
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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 |
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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 |
