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21: Review Questions
List two ways to strike, or start, an arc.
What determines the type and size of welding rod used with GTAW?
What is the correct arc length for GTAW?
What are the two ways to increase the current while welding?
Why should the welding rod be held close to the arc while welding?
Where should the torch be while filler metal is being added to the weld pool?
List two ways to prevent porosity from developing in GTAW.
Use the information (charts, figures, and text) provided in this chapter and in Chapter 20 to answer questions 8 through 11.
Answer the following for welding a fillet on 1/8″ (3 mm) mild steel:
Type of current: _____
Amount of current: _____
Electrode extension (beyond the nozzle): _____
Type of electrode: _____
Time of post flow: _____
Answer the following for welding a butt joint in 1/16″ (1.6 mm) 6061 aluminum:
Type of current: _____
Amount of current: _____
When high-frequency voltage is used: _____
Type of filler metal: _____
Answer the following for welding on 1/4″ (6 mm) stainless steel:
Type of welding current: _____
Size of electrode: _____
Type of shielding gas: _____
Shielding gas flow: _____
Shape of electrode tip: _____
Answer the following for welding on 1/4″ (6 mm) nickel alloys:
Type of current: _____
Type of filler metal: _____
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