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. Regulators control_____________ flowmeters SHOW____________.






2. In the GMAW process what does amperage control?






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






4. What does the term GMAW identify?






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






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






7. List the three methods of metal transfer with GMAW






8. In the GMAW process what does voltage control?






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






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






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






12. What does the abbreviation NEMA stand for?






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






14. What controls amperage when using GMAW?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






41. What does voltage do in an electrical circuit?






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






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






44. What 2 organizations designate specifications for GMAW wires?






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






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






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






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






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






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