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






2. What does the term GMAW identify?






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






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






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






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






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






8. Why is globular transfer generally avoided with GMAW?






9. What does inductance control?






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






11. What does voltage do in an electrical circuit?






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






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






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






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






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






17. How are GMAW guns rated?






18. What is the effect of too much slope?






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






20. In the GMAW process what does amperage control?






21. What happens when the electrode extension is increased?






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






23. What controls amperage when using GMAW?






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






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






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






27. What 2 organizations designate specifications for GMAW wires?






28. What does the abbreviation NEMA stand for?






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






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






31. In the GMAW process what does voltage control?






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






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






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






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






36. Regulators control_____________ flowmeters SHOW____________.






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






38. List the basic equipment requirements for the GMAW process






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






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






41. What does the wire feeder control?






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






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






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






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






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






47. Give a brief description of the GMAW process






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






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






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