Welding 11th grade final

35 flashcards · Other · by Maria Pokrovskiy

1. ____ clothing should be worn while welding to reduce reflection of light behind the helmet.

   Dark

2. ______ is a highly toxic gas that is produced during G.M.A.W. (Gas Metal Arc Welding)

   Ozone

3. The most common gas used for plasma arc cutting is

   Air

4. ____ _____ can be worn to protect a person from the loud noises that can occur during plasma arc cutting.

   Ear plugs

5. If the proper current setting is not known, it is Better to set the current _______ than needed prior to cutting.

   Higher

6. Plasma arc ______ requires a greater voltage than plasma arc cutting.

   gouging

7. We use size _____ welding wire in our G.M.A.W. machines.

   .030

8. The two settings on G.M.A.W. machines.

   Wire speed and voltage

9. PPE for G.M.A.W. is

   boots, jeans, leather jacket, gloves, welding helmet # 10 lens minimum.

10. Lens minimum for GMAW

    #10

11. Gas settings for GMAW

    75% Argon 25% Co2

12. G.M.A.W. and F.C.A.W

    the two types of M.I.G. welding processes.

13. Type of wire we use in GMAW machine

    Er 70s6 (not copper)

14. S.M.A.W. stand for

    Shielded Metal Arc Welding.

15. One way to check an oxy-acetylene outfit for leaks is to use

    Soapy Water

16. The purpose of the shielding gas when arc welding is to

    protect the molten puddle from impurities.

17. The three welding polarities

    AC DC+ DC-

18. Polarity we use in SMAW

    DC+

19. The purpose of the shielding gas when arc welding is to

    protect the molten puddle from impurities

20. Duty Cycle is

    the number of minutes out of 10 that a machine may operate under full load.

21. Two types of light given off while electric arc welding are

    infrared and ultraviolet

22. The function of the regulator is

    to reduce cylinder pressure to a working line pressure.

23. The oxygen cylinder valve must be ___ _____ to prevent leakage.

    Fully opened

24. The ______ cylinder is only opened ¼ to 1 full turn for quick shut off in an emergency.

    acetylene

25. The pressure in a full oxygen cylinder is

    2,200 lbs

26. The pressure in a full argon/co2 cylinder is

    2,200 lbs

27. The pressure in a full acetylene cylinder is

    250 lbs

28. Acetylene gas at pressures greater than ___ become unstable.

    15 psi

29. 5 psi

    is the acetylene torch pressure setting for cutting.

30. 30 psi

    is the oxygen torch pressure setting for cutting.

31. The E in E-7018 stands for

    Electrode

32. The first two numbers in E-7018 indicate

    minimum tensile strength

33. The third digit in E-7018 indicates

    Position

34. Four factors that must be considered when selecting an electrode

    Polarity Position Material to be welded Amount of weld needed

35. Arc length is

    the distance from the end of the electrode to the base metal.