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 effect of too much slope?






2. List the three methods of metal transfer with GMAW






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






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






5. What 2 organizations designate specifications for GMAW wires?






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






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






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






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






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






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






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






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






14. Regulators control_____________ flowmeters SHOW____________.






15. How are GMAW guns rated?






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






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






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






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






20. What controls amperage when using GMAW?






21. In the GMAW process what does voltage control?






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






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






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






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






26. Why is globular transfer generally avoided with GMAW?






27. In the GMAW process what does amperage control?






28. Give a brief description of the GMAW process






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






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






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






32. List the basic equipment requirements for the GMAW process






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






34. What does the wire feeder control?






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






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






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






38. List several industries that would use GMAW






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






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






41. What does voltage do in an electrical circuit?






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






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






44. Give a description of 'pinch effect'






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






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






47. What does the abbreviation NEMA stand for?






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






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






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