Podcast
Questions and Answers
Which type of welding is also referred to as stick welding?
Which type of welding is also referred to as stick welding?
- MIG welding
- Arc welding (correct)
- TIG welding
- Spot welding
What is the first step in preparing to arc weld?
What is the first step in preparing to arc weld?
- Checking the ground connection
- Putting on personal safety equipment
- Making sure the welding machine is in good working order (correct)
- Selecting the electrode
What should be checked before starting to weld?
What should be checked before starting to weld?
- Is the proper personal safety equipment being used?
- Has the ground connection been properly made?
- Has the proper type and size electrode been selected?
- All of the above (correct)
Which method of striking the arc is usually easier to master?
Which method of striking the arc is usually easier to master?
What is the key to forming a uniform bead in welding?
What is the key to forming a uniform bead in welding?
What should be done before restarting the arc after a bead has been formed?
What should be done before restarting the arc after a bead has been formed?
Which type of joint is usually made without the use of a filler rod?
Which type of joint is usually made without the use of a filler rod?
What type of joint is suitable for most thicknesses of metal used in aircraft?
What type of joint is suitable for most thicknesses of metal used in aircraft?
When two pieces of sheet metal must be fastened together and load stresses are not important, what type of joint is used?
When two pieces of sheet metal must be fastened together and load stresses are not important, what type of joint is used?
Which of the following is true about the expansion and contraction of metal during welding?
Which of the following is true about the expansion and contraction of metal during welding?
What is the purpose of using chill bars during welding?
What is the purpose of using chill bars during welding?
Why is preheating the metal important before welding tubular structures and castings?
Why is preheating the metal important before welding tubular structures and castings?
What should be done if all members of an engine mount are out of alignment?
What should be done if all members of an engine mount are out of alignment?
What is the preferred method to repair an engine mount member?
What is the preferred method to repair an engine mount member?
Which organization must approve the method of repair for extensively damaged engine mount rings?
Which organization must approve the method of repair for extensively damaged engine mount rings?
What should be done if the engine mount was stress relieved after welding by the manufacturer?
What should be done if the engine mount was stress relieved after welding by the manufacturer?
What are rosette welds used for in the type repairs discussed in the text?
What are rosette welds used for in the type repairs discussed in the text?
Who can approve the method of repair for extensively damaged engine mount rings?
Who can approve the method of repair for extensively damaged engine mount rings?
What is the size of the holes typically used for rosette welds?
What is the size of the holes typically used for rosette welds?
Study Notes
Welding Techniques and Preparation
- Stick welding is also known as Shielded Metal Arc Welding (SMAW).
- The first step in preparing for arc welding is to clean the metal surface thoroughly to remove contaminants.
- Before welding, check for proper equipment setup, electrical connections, and ensure the work area is clear and safe.
Arc Striking and Bead Formation
- Tapping or scratch start methods are typically easier to master compared to other arc striking techniques.
- Achieving a uniform bead in welding requires maintaining a consistent travel speed and angle during the weld.
Joint Types and Applications
- A butt joint is usually made without the use of a filler rod.
- The lap joint is suitable for most thicknesses of metal used in aircraft construction.
- For fastening two pieces of sheet metal when load stresses are not critical, a seam joint is used.
Metal Behavior and Welding Techniques
- Metal expands when heated and contracts as it cools during the welding process, which can lead to warping.
- Chill bars are used during welding to absorb excess heat and minimize warping.
Preheating and Alignment Issues
- Preheating is crucial before welding tubular structures and castings to reduce the risk of cracking and ensure proper fusion.
- If all members of an engine mount are misaligned, they must be realigned to specifications before welding.
- Preferred repairs for misaligned engine mount members involve straightening them to proper alignment.
Repair Method Approval and Stress Relief
- The Federal Aviation Administration (FAA) must approve the method of repair for extensively damaged engine mount rings.
- If an engine mount was stress relieved after welding by the manufacturer, follow the manufacturer's instructions regarding further repairs.
Specialized Welds and Dimensions
- Rosette welds are utilized in repairs to ensure strength and are commonly used in attaching braces and support structures.
- Typically, holes used for rosette welds have a diameter of around 3/8 inch, allowing for proper fusion and strength in the weld.
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Description
Test your knowledge of different types of joints used in welding with this quiz! From butt joints to lap joints and tee joints, learn about the characteristics and techniques for each type of joint. Explore when and how to use filler rods and beveling techniques for optimal weld strength.
