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 the factors that determine the mode of metal transfer






2. List several industries that would use GMAW






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






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






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






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






7. In the GMAW process what does voltage control?






8. What controls amperage when using GMAW?






9. What does the wire feeder control?






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






11. In the GMAW process what does amperage control?






12. Give a description of 'pinch effect'






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






14. What 2 organizations designate specifications for GMAW wires?






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






16. What does the abbreviation NEMA stand for?






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






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






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






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






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






22. Why is globular transfer generally avoided with GMAW?






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






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






25. What does voltage do in an electrical circuit?






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






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






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






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






30. What is the effect of too much slope?






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






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






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






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






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






36. How are GMAW guns rated?






37. Give a brief description of the GMAW process






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






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






40. What does inductance control?






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






42. List the three methods of metal transfer with GMAW






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






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






45. What does the term GMAW identify?






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






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






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






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






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