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






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






3. What does voltage do in an electrical circuit?






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






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






6. What does inductance control?






7. What controls amperage when using GMAW?






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






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






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






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






12. In the GMAW process what does amperage control?






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






14. List the three methods of metal transfer with GMAW






15. Give a brief description of the GMAW process






16. What does the term GMAW identify?






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






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






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






20. List the basic equipment requirements for the GMAW process






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






22. In the GMAW process what does voltage control?






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






24. What does the wire feeder control?






25. What is the effect of too much slope?






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






27. What does the abbreviation NEMA stand for?






28. What 2 organizations designate specifications for GMAW wires?






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






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






31. Why is globular transfer generally avoided with GMAW?






32. Give a description of 'pinch effect'






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






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






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






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






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






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






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






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






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






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






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






44. List several industries that would use GMAW






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






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






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






48. What happens when the electrode extension is increased?






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






50. How are GMAW guns rated?