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






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






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






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






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






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






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






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






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






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






11. Give a brief description of the GMAW process






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






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






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






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






16. What does the term GMAW identify?






17. What happens when the electrode extension is increased?






18. What does voltage do in an electrical circuit?






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






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






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






22. What does the wire feeder control?






23. List the three methods of metal transfer with GMAW






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






25. In the GMAW process what does voltage control?






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






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






28. List the basic equipment requirements for the GMAW process






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






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






31. Regulators control_____________ flowmeters SHOW____________.






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






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






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






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






36. How are GMAW guns rated?






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






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






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






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






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






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






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






44. What 2 organizations designate specifications for GMAW wires?






45. What does the abbreviation NEMA stand for?






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






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






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






49. What controls amperage when using GMAW?






50. List several industries that would use GMAW







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