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 key advantage of short circuiting transfer?






2. What is the effect of too much slope?






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






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






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






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






7. What 2 organizations designate specifications for GMAW wires?






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






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






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






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






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






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






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






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






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






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






18. What does inductance control?






19. What does voltage do in an electrical circuit?






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






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






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






23. List the basic equipment requirements for the GMAW process






24. What does the wire feeder control?






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






26. In the GMAW process what does voltage control?






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






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






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






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






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






32. What controls amperage when using GMAW?






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






34. What does the term GMAW identify?






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






36. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






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






42. List several industries that would use GMAW






43. Why is globular transfer generally avoided with GMAW?






44. How are GMAW guns rated?






45. Give a brief description of the GMAW process






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






47. Give a description of 'pinch effect'






48. What happens when the electrode extension is increased?






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






50. List the three methods of metal transfer with GMAW