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- 1. Multiple ChoiceOxyfuel welding uses oxygen and what other gas?actyleneargonarbinitehelium
- 2. Multiple ChoiceWhat polarity does oxyfuel welding utilize?DC+ACNo CurrentSingle phase current
- 3. Multiple Choicewhy is acetylene the only fuel gas that can be used for welding?it's the only gas with enough force to weldit's the only gas that burns hot enough for weldingits the only gas that can be burned safetyits the only gas stable enough for welding
- 4. Multiple Choicewhat is the recommended filter shade lens needed for oxy acetylene welding?10785
- 5. Multiple Choicewhat color are acetylene fuel hoses?blackgreenredbrass
- 6. Multiple Choicewhat is the proper ratio of oxygen to acetylene when doing oxy fuel welding?2:15:101:21/4 turn
- 7. Multiple Choicewhich gas must be opened first when O/A welding?AcetyleneOxygenAirgas
- 8. Multiple Choicethe green hose in O/A welding is always connected to what?oxygenfuelacetyleneair
- 9. Multiple Choiceacetylene gas is unstable, this means it?can self combustburns well underwaterdon't ever move the gas cylinderdon't light fuel off acetylene ever
- 10. Multiple Choiceacetylene gas can self combust when it reaches what pressure?5 psi10 psi15 psi15 cfh
- 11. Multiple Choicewhy is oxygen added to acetylene for welding?make it hottermake the flame cleanerreduce the amount of carbon depositto puddle metal with other metals
- 12. Multiple Choicewhat is flashback?a burn on your eyes from UV lightwhen fire goes back inside the the torch or linea loud popping noise when weldingwhen molten metal sparks up towards the operator
- 13. Multiple ChoiceThe first step of setting and lighting the torch is?adjust the neutral flameincrease the acetylene flow rate so the flame feathers outcheck torch tip number for correct size and set angledrain gas lines
- 14. Multiple Choicea thinner glove is typically preferred when O/A welding because?the temperature is not very hotbecause its not syntheticin case of fire preventionfinger and manual dexterity
- 15. Multiple Choicewhat is a flint lightera lighter without a fuel source attachedany lighter that used a flint and steel to make a sparka long lighter typically used for a welding or a bbqan open flame source to light a flame
- 16. Multiple ChoiceWhat is an oxidizing flame?a flame containing excess amount of fuel gasa flame containing excess amount of oxygena flame that pushed away all oxygena flame that use oxygen to get hotter
- 17. Multiple ChoiceWhat are the different welding tips used for during O/A welding?for different thickness of metalfor different types of metalto switch from cutting to weldingto control the flame so it is safe
- 18. Multiple Choicewhat is a flashback arrestor used for?prevent oxygen from entering the weldto prevent fire from going back into the lines or tankto prevent operator eye injuriesto block UV light from the operator
- 19. Multiple Choicewhat is the sign that a neutral flame has been established when O/A welding?the fuel lets out a lot less carbon (black particles)the welding torch flame is quite and roundwhen the torch is hovering the correct distance from the platethe second flame merges with the 3rd one to become one
- 20. Multiple Choiceabout how far away should the neutral flame be from the base metal?1 inch1/2 inch1/8 inch1/4 inch
- 21. Multiple ChoiceHow should the torch be held when O/A welding?in one hand like a pencilwith both hands like a pencilusing a fist to support the torch handlea light grip with fuel adjustment knob in one hand
- 22. Multiple Choicewhat is a carburizing flame?a flame that is used to weld carbon steela flame containing excess oxygena flame containing no carbona flame containing excess amounts of fuel
- 23. Multiple ChoiceWhat is the acetylene pressure setting for correctly O/A welding5 psi5 cfh5 kg5 abs
- 24. Multiple ChoiceO/A is a two handed welding process, what does this mean?two hands are used to control the large fire existing the torchgrab the torch with two hands, both like a pencilone hand operates the torch while the other hand adds filler materialone hand operates the torch while the other hand controls gas pressure
- 25. Multiple Choicewhat is correct working pressure?correct pressure setting including the amount of pressure needed to push the gas through the linethe setting of the pressure needed to weldthe pressure setting used for welding that creates a neutral flamethe time of the weld takes times the size of the bead equals the strength of the weld from gas pressure
- 26. Multiple Choicethe larger the number of the welding tip, the _____________thinner the metal it can weldthicker the metal it can weldthe more gas pressure is required to operate the torch tipthe more oxygen gas flow rate required to complete fusion
- 27. Multiple Choicewhat is the correct torch angle for O/A welding?45 degrees in direction of travel45 degrees pointing back towards the operator15 degrees in direction of travel15 degrees pointing back towards the operator
- 28. Multiple Choicewhen completion of welding what must an operator do to the equipment?mark it with soap stone to denote usage hoursremove torch parts and leak check the systembleed the lines and zero the regulatorscheck for adequate fuel supply remaining due to acetylene 7 hour fill rule
- 29. Multiple Choicewhich is the part of the regulator that adjusts the amount of gas that is allowed to flow through the torch?adjustment valveset screwpressure indicatorflashback arrestor
- 30. Multiple ChoiceAll acetylene fitting are_____________reversed threadedright hand threadedhand tightened onlyfine coarse threaded
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