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 purpose of the pick- up lead on a voltage sensing wire feeder?






2. What 2 organizations designate specifications for GMAW wires?






3. Give a brief description of the GMAW process






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






5. What is the effect of too much slope?






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






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






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






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






10. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






26. In the GMAW process what does amperage control?






27. How are GMAW guns rated?






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






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






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






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






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






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






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






35. Give a description of 'pinch effect'






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






37. List the three methods of metal transfer with GMAW






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






39. In the GMAW process what does voltage control?






40. What does the term GMAW identify?






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






42. List several industries that would use GMAW






43. What does inductance control?






44. Why is globular transfer generally avoided with GMAW?






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






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






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






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






49. What does the wire feeder control?






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