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






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






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






4. What 2 organizations designate specifications for GMAW wires?






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






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






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






8. List several industries that would use GMAW






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






10. What controls amperage when using GMAW?






11. What does the term GMAW identify?






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






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






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






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






16. What does the abbreviation NEMA stand for?






17. Regulators control_____________ flowmeters SHOW____________.






18. What does the wire feeder control?






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






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






21. What is the effect of too much slope?






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






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






24. In the GMAW process what does voltage control?






25. List the three methods of metal transfer with GMAW






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






27. Give a brief description of the GMAW process






28. What does voltage do in an electrical circuit?






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






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






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






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






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






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






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






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






37. List the basic equipment requirements for the GMAW process






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






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






40. What happens when the electrode extension is increased?






41. Why is globular transfer generally avoided with GMAW?






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






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






44. In the GMAW process what does amperage control?






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






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






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






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






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






50. What does inductance control?