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 3 wire drive systems and give a short description of each






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






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






4. In the GMAW process what does amperage control?






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






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






7. Regulators control_____________ flowmeters SHOW____________.






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






9. Why is globular transfer generally avoided with GMAW?






10. What does inductance control?






11. Give a brief description of the GMAW process






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






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






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






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






16. Give a description of 'pinch effect'






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






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






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






20. What controls amperage when using GMAW?






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






22. List several industries that would use GMAW






23. Why is a line heater required when using GMAW?






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






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






26. What does voltage do in an electrical circuit?






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






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






29. In the GMAW process what does voltage control?






30. What 2 organizations designate specifications for GMAW wires?






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






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






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






34. What does the wire feeder control?






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






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






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






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






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






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






41. List the basic equipment requirements for the GMAW process






42. What does the term GMAW identify?






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






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






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






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






47. What is the effect of too much slope?






48. List the three methods of metal transfer with GMAW






49. What happens when the electrode extension is increased?






50. What does the abbreviation NEMA stand for?