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 required arc voltage used for short circuit transfer?






2. What happens when the electrode extension is increased?






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






4. What 2 organizations designate specifications for GMAW wires?






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






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






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






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






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






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






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






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






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






14. List the three methods of metal transfer with GMAW






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






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






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






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






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






20. Why is globular transfer generally avoided with GMAW?






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






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






23. What does the term GMAW identify?






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






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






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






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






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






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






30. What is the effect of too much slope?






31. What does voltage do in an electrical circuit?






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






33. In the GMAW process what does amperage control?






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






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






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






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






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






39. Regulators control_____________ flowmeters SHOW____________.






40. In the GMAW process what does voltage control?






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






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






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






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






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






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






47. What does the wire feeder control?






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






49. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.






50. List several industries that would use GMAW