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






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






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






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






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






6. What 2 organizations designate specifications for GMAW wires?






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






8. What is the effect of too much slope?






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






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






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






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






13. What controls amperage when using GMAW?






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






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






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






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






18. What does the term GMAW identify?






19. Give a description of 'pinch effect'






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






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






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






23. In the GMAW process what does amperage control?






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






25. Give a brief description of the GMAW process






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






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






28. List several industries that would use GMAW






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






30. How are GMAW guns rated?






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






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






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






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






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






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






37. List the three methods of metal transfer with GMAW






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






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






40. What does inductance control?






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






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






43. What does the wire feeder control?






44. What does voltage do in an electrical circuit?






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






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






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






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






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






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