Description should include

• defining GTAW
• identifying the role of tungsten
• determining advantages and disadvantages
• identifying electrical polarity
• identifying the power source
• defining types of shielding gas.

Process/Skill Questions: 

• How can the GTAW process be illustrated?
• When is it appropriate to use direct or alternating current?
• What is the power source for GTAW?
• What are common shielding gasses?