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 does voltage do in an electrical circuit?






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






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






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






5. What does the abbreviation NEMA stand for?






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






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






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






9. List the three methods of metal transfer with GMAW






10. What does the term GMAW identify?






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






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






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






14. In the GMAW process what does amperage control?






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






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






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






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






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






20. Give a brief description of the GMAW process






21. How are GMAW guns rated?






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






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






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






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






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






27. What does the wire feeder control?






28. What happens when the electrode extension is increased?






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






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






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






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






33. List the basic equipment requirements for the GMAW process






34. What controls amperage when using GMAW?






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






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






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






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






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






40. What 2 organizations designate specifications for GMAW wires?






41. List several industries that would use GMAW






42. In the GMAW process what does voltage control?






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






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






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






46. Regulators control_____________ flowmeters SHOW____________.






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






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






49. What is the effect of too much slope?






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