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 are the 2 types of wire feeders available?






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






3. How are GMAW guns rated?






4. In the GMAW process what does voltage control?






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






6. What does the abbreviation NEMA stand for?






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






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






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






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






11. List several industries that would use GMAW






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






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






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






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






16. What does voltage do in an electrical circuit?






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






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






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






20. Regulators control_____________ flowmeters SHOW____________.






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






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






23. What does the wire feeder control?






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






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






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






27. Give a description of 'pinch effect'






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






29. What happens when the electrode extension is increased?






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






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






32. Give a brief description of the GMAW process






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






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






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






36. In the GMAW process what does amperage control?






37. What is the effect of too much slope?






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






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






40. What controls amperage when using GMAW?






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






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






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






44. Why is globular transfer generally avoided with GMAW?






45. What does inductance control?






46. What does the term GMAW identify?






47. List the basic equipment requirements for the GMAW process






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






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






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