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






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






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






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






5. What is the effect of too much slope?






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






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






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






9. List the three methods of metal transfer with GMAW






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






11. What does voltage do in an electrical circuit?






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






13. What 2 organizations designate specifications for GMAW wires?






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






15. What controls amperage when using GMAW?






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






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






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






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






20. Give a description of 'pinch effect'






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






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






23. What does inductance control?






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






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






26. List the basic equipment requirements for the GMAW process






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






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






29. How are GMAW guns rated?






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






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






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






33. What does the wire feeder control?






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






35. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






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






41. List several industries that would use GMAW






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






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






44. What does the abbreviation NEMA stand for?






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






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






47. Give a brief description of the GMAW process






48. What does the term GMAW identify?






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






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