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 reason glass 'tube' type flowmeters must have the tube mounted truly vertical?






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






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






4. Give a description of 'pinch effect'






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






6. What controls amperage when using GMAW?






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






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






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






10. In the GMAW process what does amperage control?






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






12. What does the wire feeder control?






13. What happens when the electrode extension is increased?






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






15. How are GMAW guns rated?






16. What does inductance control?






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






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






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






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






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






22. What does the term GMAW identify?






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






24. What does the abbreviation NEMA stand for?






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






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






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






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






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






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






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






32. What 2 organizations designate specifications for GMAW wires?






33. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






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






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






40. Why is globular transfer generally avoided with GMAW?






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






42. List several industries that would use GMAW






43. List the basic equipment requirements for the GMAW process






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






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






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






47. What is the effect of too much slope?






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






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






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