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SkillsUSA GMAW Test
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SkillsUSA GMAW Test
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25 Questions

1. Why is the term GMAW preferred over MIG or MAG?

2. What is the purpose of the pick-up lead on a voltage sensing wire feeder?

3. What would be an indication that the drive roll pressure is adjusted correctly?

4. Is the arc voltage for spray transfer higher or lower than that used for short circuit transfer?

5. Why is a line heater required when using GMAW?

6. With straight polarity where is 2/3 of the arc energy?

7. What Gas Mixture Is Generally Associated With Pulse Transfer On Steel?

8. What Gas Mixture Is Generally Associated With Spray Transfer On Steel?

9. What is a solenoid valve and what actuates it?

10. What Is Not An Advantage To Pulse Welding?

11. How many times per second does short circuiting take place?

12. List the three methods of metal transfer with GMAW:

13. What current and polarity is generally used with GMAW?

14. What type of power source is used with a constant speed wire feeder?

15. What wire are knurled drive rolls most commonly used on?

16. As A General Rule - What Is The Minimum Argon Content For Pulse Welding?

17. List 3 wire drive systems and give a short description of each:

18. During Spray Transfer - What Does Increasing The Inductance Do?

19. What is another term for electrode holders for GMAW?

20. Why is a fiber washer required and what cylinder gas requires it?

21. What Is A Benefit Of Copper Coated Cmaw Wires?

22. What does the wire feeder control?

23. When using flat drive rolls with too much pressure on copper coated solid wires what problem could take place?

24. List the basic equipment requirements for the GMAW process:

25. What does inductance control?

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