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






2. In the GMAW process what does voltage control?






3. List several industries that would use GMAW






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






5. In the GMAW process what does amperage control?






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






7. What does the wire feeder control?






8. What controls amperage when using GMAW?






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






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






11. Give a brief description of the GMAW process






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






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






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






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






16. What happens when the electrode extension is increased?






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






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






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






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






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






22. Regulators control_____________ flowmeters SHOW____________.






23. What does voltage do in an electrical circuit?






24. List the three methods of metal transfer with GMAW






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






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






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






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






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






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






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






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






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






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






35. List the basic equipment requirements for the GMAW process






36. Why is globular transfer generally avoided with GMAW?






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






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






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






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






41. What is the effect of too much slope?






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






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






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






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






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






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






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






49. What does the term GMAW identify?






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