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4 aircraft welding
| Question | Answer |
|---|---|
| Name the three principal types of welding. | Gas welding, electric arc welding, and electric resistance welding. |
| What are some advantages of gas shielded arc welding? | The weld is stronger, more ductile, and more corrosion resistant. |
| Which method of welding is likely to cause buckling or warping of thin Metal Sheets? | Electric Arc (or TIG) welding. |
| What is the purpose of shielding an arc weld with an inert gas? | The gas prevents atmospheric oxygen and/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? | The 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? | A neutral flame. |
| 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 in properly tinned. |
| What is the preferred method for welding aluminum? | Tungsten Inert Gas (TIG) welding. |
| What is the preferred method for welding magnesium? | Tungsten Inert Gas (TIG) welding. |
| 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 the gas pressure. |
| When an oxy-acetylene torch is extinguished, which valve is turned off first? | Turn off the acetylene gas valve first. |
| When a gas welding project is completed, what safety precautions should be accomplished? | All the valves are turned off and the gas pressures are 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. |