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. List the factors that determine the mode of metal transfer






2. What 2 organizations designate specifications for GMAW wires?






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






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






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






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






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






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






9. List the three methods of metal transfer with GMAW






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






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






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






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






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






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






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






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






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






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






20. Why is globular transfer generally avoided with GMAW?






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






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






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






24. What does the abbreviation NEMA stand for?






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






26. What is the effect of too much slope?






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






28. List several industries that would use GMAW






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






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






31. List the basic equipment requirements for the GMAW process






32. What controls amperage when using GMAW?






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






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






35. What does voltage do in an electrical circuit?






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






37. Give a description of 'pinch effect'






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






39. How are GMAW guns rated?






40. What does the wire feeder control?






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






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






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






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






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






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






47. Regulators control_____________ flowmeters SHOW____________.






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






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






50. What is a solenoid valve and what actuates it?