Test your basic knowledge |

Gas Metal Arc Welding

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What is another term for electrode holders for GMAW?






2. What is the preferred drive roll design for solid wires?






3. List the three methods of metal transfer with GMAW






4. A 10 minute cycle of welding time vs cooling time a given machine can handle.






5. What is the recommended electrode stick- out for .035 solid wire?






6. List 3 forms compressed gases may be supplied for welding






7. How are GMAW guns rated?






8. What is the purpose of a regulator and what does it indicate on its gauges?






9. What power sources are used with the GMAW Process?






10. What 2 controls are found on a GMAW set- up?






11. A pull type drive system is usually used on what type of material?






12. What does the term GMAW identify?






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






14. What is an advantage of pulsed arc transfer with GMAW?






15. Why must CO2 cylinders be used in the vertical position?






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






17. What processes are constant current (CC) power sources designed to be used with?






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






19. Why is globular transfer generally avoided with GMAW?






20. What controls amperage when using GMAW?






21. List the basic equipment requirements for the GMAW process






22. What output on the welding machine is used to rate the duty cycle?






23. What does a flowmeter do and what does it measure?






24. Draw a typical volt/amp curve that would be found with a power source designed for SMAW or GTAW






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






26. What happens when the electrode extension is increased?






27. List several industries that would use GMAW






28. What controls the wire speed on a voltage sensing wire feeder?






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






30. What is the main purpose of 'slope'?






31. What 2 organizations designate specifications for GMAW wires?






32. When is the metal transferred with short circuit transfer?






33. What is the required arc voltage used for short circuit transfer?






34. What is the key advantage of short circuiting transfer?






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






36. In the GMAW process what does amperage control?






37. Give a brief description of the GMAW process






38. What is the purpose of the shielding gas used in GMAW?






39. List the factors that determine the mode of metal transfer






40. What is the disadvantage of the gauge preset type of regulator/flowmeter?






41. What is a typical flow rate of CO2 for short circuit transfer?






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






43. Give a description of 'pinch effect'






44. What does inductance control?






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






46. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?






47. What type of power source is commonly used with a voltage sensing wire feeder?






48. In the GMAW process what does voltage control?






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






50. What term is used to describe when the workpiece is hooked to the negative pole on the power source?