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 wire are knurled drive rolls most commonly used on?






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






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






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






5. In the GMAW process what does amperage control?






6. List the basic equipment requirements for the GMAW process






7. What is the effect of too much slope?






8. Give a brief description of the GMAW process






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






10. What effect does increasing and decreasing the inductance have on the weld?






11. What does the term GMAW identify?






12. List several industries that would use GMAW






13. What happens when the electrode extension is increased?






14. What 2 organizations designate specifications for GMAW wires?






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






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






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






18. Why is globular transfer generally avoided with GMAW?






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






20. Draw a typical volt amp curve for a machine that is designed for GMAW






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






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






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






24. What is the maximum distance that hard wire can be successfully pushed?






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






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






27. List the three methods of metal transfer with GMAW






28. What does the wire feeder control?






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






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






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






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






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






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






35. What does the abbreviation NEMA stand for?






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






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






38. What does voltage do in an electrical circuit?






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






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






41. What controls amperage when using GMAW?






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






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






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






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






46. What does inductance control?






47. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.






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






49. How are GMAW guns rated?






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