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. List 3 forms compressed gases may be supplied for welding






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






4. Give a description of 'pinch effect'






5. What are the 2 types of wire feeders available?






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






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






8. What does voltage do in an electrical circuit?






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






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






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






12. What is the effect of too much slope?






13. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?






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






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






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






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






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






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






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






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






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






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






24. What controls amperage when using GMAW?






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






26. In the GMAW process what does voltage control?






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






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






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






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






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






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






33. Why is globular transfer generally avoided with GMAW?






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






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






36. What does the abbreviation NEMA stand for?






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






38. List several industries that would use GMAW






39. List the three methods of metal transfer with GMAW






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






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






42. List the basic equipment requirements for the GMAW process






43. In the GMAW process what does amperage control?






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






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






46. How are GMAW guns rated?






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






48. What 2 organizations designate specifications for GMAW wires?






49. Regulators control_____________ flowmeters SHOW____________.






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