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






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






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






4. What happens when the electrode extension is increased?






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






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






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






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






9. What does the wire feeder control?






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






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






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






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






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






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






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






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






18. In the GMAW process what does voltage control?






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






20. In the GMAW process what does amperage control?






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






22. What controls amperage when using GMAW?






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






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






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






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






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






28. List several industries that would use GMAW






29. What does voltage do in an electrical circuit?






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






31. What does inductance control?






32. What does the abbreviation NEMA stand for?






33. Why is globular transfer generally avoided with GMAW?






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






35. List the basic equipment requirements for the GMAW process






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






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






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






39. What does the term GMAW identify?






40. What is the effect of too much slope?






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






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






43. What 2 organizations designate specifications for GMAW wires?






44. How are GMAW guns rated?






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






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






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






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






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






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