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. In the GMAW process what does amperage control?






3. List the basic equipment requirements for the GMAW process






4. What does the wire feeder control?






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






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






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






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






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






10. What does voltage do in an electrical circuit?






11. What is the effect of too much slope?






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






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






14. What controls amperage when using GMAW?






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






16. List the three methods of metal transfer with GMAW






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






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






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






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






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






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






23. What does the term GMAW identify?






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






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






26. Give a brief description of the GMAW process






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






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






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






30. What does inductance control?






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






32. Why is globular transfer generally avoided with GMAW?






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






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






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






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






37. Regulators control_____________ flowmeters SHOW____________.






38. List several industries that would use GMAW






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






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






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






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






43. In the GMAW process what does voltage control?






44. What happens when the electrode extension is increased?






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






46. How are GMAW guns rated?






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






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






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






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