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 controls the wire speed on a voltage sensing wire feeder?






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






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






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






5. What does the abbreviation NEMA stand for?






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






7. Why is globular transfer generally avoided with GMAW?






8. Give a description of 'pinch effect'






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






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






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






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






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






14. List the three methods of metal transfer with GMAW






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






16. List the basic equipment requirements for the GMAW process






17. What does inductance control?






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






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






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






21. What does the wire feeder control?






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






23. What happens when the electrode extension is increased?






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






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






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






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






28. In the GMAW process what does voltage control?






29. What 2 organizations designate specifications for GMAW wires?






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






31. List several industries that would use GMAW






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






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






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






35. Give a brief description of the GMAW process






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






37. What is the effect of too much slope?






38. In the GMAW process what does amperage control?






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






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






41. What does the term GMAW identify?






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






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






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






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






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






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






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






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






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