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






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






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






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






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






6. What does inductance control?






7. What happens when the electrode extension is increased?






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






9. Regulators control_____________ flowmeters SHOW____________.






10. List the basic equipment requirements for the GMAW process






11. What 2 organizations designate specifications for GMAW wires?






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






13. Why is globular transfer generally avoided with GMAW?






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






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






16. In the GMAW process what does voltage control?






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






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






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






20. What does the term GMAW identify?






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






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






23. Give a description of 'pinch effect'






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






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






26. List the three methods of metal transfer with GMAW






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






28. How are GMAW guns rated?






29. What controls amperage when using GMAW?






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






31. List several industries that would use GMAW






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






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






34. What does the wire feeder control?






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






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






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






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






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






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






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






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






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






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






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






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






47. What does voltage do in an electrical circuit?






48. In the GMAW process what does amperage control?






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






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