Description should include

• defining GMAW
• identifying the role of shielding gas
• determining advantages and disadvantages
• identifying electrical polarity
• identifying the power source
• defining transfer modes.

Process/Skill Questions: 

• How can the GMAW process be illustrated?
• What is the polarity for GMAW?
• What are common shielding gasses for GMAW?
• What is the power source for GMAW?