Test your basic knowledge |

Gas Metal Arc Welding

Subject : engineering
Instructions:
  • Answer 50 questions in 20 minutes. 2 minutes extra for reading the instructions.
  • 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. Why is a fiber washer required and what cylinder gas requires it?






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






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






4. What does voltage do in an electrical circuit?






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






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






7. What does the term GMAW identify?






8. List the basic equipment requirements for the GMAW process






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






10. What is the effect of too much slope?






11. Regulators control_____________ flowmeters SHOW____________.






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






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






14. What controls amperage when using GMAW?






15. What 2 organizations designate specifications for GMAW wires?






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






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






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






19. Why is globular transfer generally avoided with GMAW?






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






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






22. List several industries that would use GMAW






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






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






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






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






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






28. Give a brief description of the GMAW process






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






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






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






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






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






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






35. In the GMAW process what does voltage control?






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






37. Give a description of 'pinch effect'






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






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






40. What does the wire feeder control?






41. What happens when the electrode extension is increased?






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






43. List the three methods of metal transfer with GMAW






44. What does inductance control?






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






46. What does the abbreviation NEMA stand for?






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






48. In the GMAW process what does amperage control?






49. How are GMAW guns rated?






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