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 the disadvantage of the gauge preset type of regulator/flowmeter?






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






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






4. Give a brief description of the GMAW process






5. What controls amperage when using GMAW?






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






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






8. How are GMAW guns rated?






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






10. Give a description of 'pinch effect'






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






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






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






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






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






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






17. Why is globular transfer generally avoided with GMAW?






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






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






20. List the basic equipment requirements for the GMAW process






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






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






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






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






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






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






27. In the GMAW process what does voltage control?






28. What does inductance control?






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






30. What does the abbreviation NEMA stand for?






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






32. List the three methods of metal transfer with GMAW






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






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






35. What does the term GMAW identify?






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






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






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






39. List several industries that would use GMAW






40. What is the effect of too much slope?






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






42. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






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






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






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






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