Welding Final 2010

85 Questions | Total Attempts: 2129

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Welding Final 2010

Welding is the process of joining materials – usually metals or thermoplastics – by causing fusion, a method of metal-joining technique that involves melting the base metal. Do you consider yourself a master of the practice? Prove it with this quiz!


Questions and Answers
  • 1. 
    Potential hazards relating to arc welding are
    • A. 

      Radiation

    • B. 

      Fumes

    • C. 

      Toxic gases

    • D. 

      All of the above

  • 2. 
    When using a fire extinguisher to extinguish a fire, it should be
    • A. 

      Pointed at the base of the fire

    • B. 

      Moved up and down to cool the flames

    • C. 

      Pointed at the top of the fire

    • D. 

      Held within six (6) inches of the flames

  • 3. 
    What type of fire extinguisher should be used on electrical fires?
    • A. 

      Type A

    • B. 

      Type B

    • C. 

      TypeC

    • D. 

      Type D

  • 4. 
    What are the initials of the federal organization created to insure safe and sanitary working conditions for employees?
    • A. 

      FAA

    • B. 

      IRS

    • C. 

      FDA

    • D. 

      OSHA

  • 5. 
    The maximum safe working pressure for Acetylene is
    • A. 

      10 psi.

    • B. 

      15 psi.

    • C. 

      20 psi.

    • D. 

      32 psi.

  • 6. 
    Vaporized metals, such as zinc, cadmium, lead, chromium and beryllium
    • A. 

      Are hazardous

    • B. 

      Can be ignored

    • C. 

      Are highly flammable

    • D. 

      May cause slag inclusions

  • 7. 
    Fuel gas hoses are usually colored
    • A. 

      Green

    • B. 

      Red

    • C. 

      Blue

    • D. 

      Yellow

  • 8. 
    Flash burn is
    • A. 

      Another name for a severe sunburn

    • B. 

      A burn caused by the welding arc coming in contact with bare skin

    • C. 

      A bum to the eye caused by exposure to ultraviolet light from the welding arc

    • D. 

      Damage to equipment and clothing due to the extreme heat of the welding arc

  • 9. 
    One should never enter a welding shop without wearing
    • A. 

      Gloves

    • B. 

      Safety glasses

    • C. 

      A welding helmet

    • D. 

      Welding leathers

  • 10. 
    What should one never use on gas cylinders, regulators, connections and hoses?
    • A. 

      Wrenches

    • B. 

      Teflon tape

    • C. 

      Leak detectors

    • D. 

      Oil

  • 11. 
    One should never cut or weld directly against
    • A. 

      Cast iron

    • B. 

      Concrete

    • C. 

      A workbench

    • D. 

      A non-flammable surface

  • 12. 
    One should never operate arc welding equipment while
    • A. 

      Standing on wet or damp floors

    • B. 

      In poorly lighted areas

    • C. 

      Someone is standing near by

    • D. 

      In a confined area with proper ventilation

  • 13. 
    A burn that causes the skin to blister is referred to as a
    • A. 

      First degree burn

    • B. 

      Second degree burn

    • C. 

      Third degree burn

    • D. 

      Fourth degree burn

  • 14. 
    The selection of a correct lens shade number depends on the
    • A. 

      Brightness of the sun in the area

    • B. 

      Type of shielding gas being used

    • C. 

      Amount of welding current being used

    • D. 

      Filler metal being used

  • 15. 
    Federal regulation requires that hazardous information about a product be provided to all users of that product. The form used to provide this information is called a(n)
    • A. 

      Information Form (IF)

    • B. 

      Hazardous Information Sheet (HIS)

    • C. 

      Occupational Safety and Hazard Form (OSHF)

    • D. 

      Material Safety Data Sheet (MSDS)

  • 16. 
    Which of the following is the only acceptable method for lighting oxyfuel torches?
    • A. 

      Matches

    • B. 

      Cigarette lighter

    • C. 

      Welding arc

    • D. 

      Striker

  • 17. 
    Areas that have less than__________ cubic feet per welder, or that have ceilings less than 16 feet high, require forced ventilation.
    • A. 

      8,000

    • B. 

      4,000

    • C. 

      10,000

    • D. 

      12,000

  • 18. 
    A confined space is one that
    • A. 

      Has a flammable atmosphere

    • B. 

      Has unrestricted means of entry or exit for employees

    • C. 

      Is designed for continuous employee occupancy

    • D. 

      Is large enough that a person can enter and perform tasks

  • 19. 
    A Hot Work Permit
    • A. 

      Authorizes the performance of work potentially posing a fire hazard

    • B. 

      Promotes the development of standard fire safety guidelines

    • C. 

      Records unsafe conditions at a job site

    • D. 

      Helps the manager keep records of hazardous spaces

  • 20. 
    While welding, ventilation should be placed as close to the fume source as practical.
    • A. 

      True

    • B. 

      False

  • 21. 
    Because of the low amount of ultraviolet light present, it is not necessary to use shaded lenses when oxy-fuel cutting.
    • A. 

      True

    • B. 

      False

  • 22. 
    Long hair, loose-fitting clothes, and ties are personal safety hazards around rotating equipment.
    • A. 

      True

    • B. 

      False

  • 23. 
    A butane or propane cigarette lighter is safe around welding equipment as long as it is kept in one's pocket.
    • A. 

      True

    • B. 

      False

  • 24. 
    A fully charged oxygen cylinder contains approximately 225 psi at 70° F.
    • A. 

      True

    • B. 

      False

  • 25. 
    Safety glasses are not required when welding with the helmet down.
    • A. 

      True

    • B. 

      False

  • 26. 
    Skin contact with liquid oxygen can cause frostbite.
    • A. 

      True

    • B. 

      False

  • 27. 
    Gas cylinders must be chained or secured at all times.
    • A. 

      True

    • B. 

      False

  • 28. 
    Oxygen cylinders should never be stored with flammable gases such as acetylene cylinders.
    • A. 

      True

    • B. 

      False

  • 29. 
    In order to maintain production, it is acceptable to operate welding equipment beyond its rated capacity.
    • A. 

      True

    • B. 

      False

  • 30. 
    When not in use, an electrode holder, GTAW torch or MIG gun should not be placed in contact with a grounded metal surface.
    • A. 

      True

    • B. 

      False

  • 31. 
    Acetylene cylinders should never be operated while lying on their side because acetone could be drawn into the valve, regulator and hoses.
    • A. 

      True

    • B. 

      False

  • 32. 
    One should never touch an electrode to a metal surface other than the workpiece because those surfaces may become electrically live.
    • A. 

      True

    • B. 

      False

  • 33. 
    ANSI Z49.1 allows oxygen to be used as a substitute for compressed air when necessary.
    • A. 

      True

    • B. 

      False

  • 34. 
    Burns are some of the most common and painful injuries in a welding shop.
    • A. 

      True

    • B. 

      False

  • 35. 
    Fuel gas fittings are equipped with left hand threads.
    • A. 

      True

    • B. 

      False

  • 36. 
    Of the following, which is not a requirement for the SMAW process?
    • A. 

      Electricity

    • B. 

      Gas supply

    • C. 

      Base metal

    • D. 

      Filler metal

  • 37. 
    • A. 

      Once opened, it should be kept in an electrode oven.

    • B. 

      The weld deposit has a minimum tensile strength of 70,000 psi.

    • C. 

      It is suitable for use in the flat and horizontal fillet positions only.

    • D. 

      It is suitable for use in all positions.

    • E. 

      It is a low hydrogen electrode.

  • 38. 
    The distance from the molten tip of the SMAW electrode to the surface of the molten weld pool should be
    • A. 

      One electrode diameter

    • B. 

      Open circuit voltage

    • C. 

      Ignition length

    • D. 

      Arc current

  • 39. 
    In the SMAW process, as arc length increases, current (amperage)
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Remains relatively constant

    • D. 

      First increases then decreases

    • E. 

      First decreases then increases

  • 40. 
    Which one of the following electrodes is not suitable for use in all positions?
    • A. 

      E6010

    • B. 

      E6011

    • C. 

      E7018

    • D. 

      E7024

    • E. 

      E7048

  • 41. 
    Which of the following electrodes would you select to produce a weld with shallow penetration?
    • A. 

      E6010

    • B. 

      E6011

    • C. 

      E6013

    • D. 

      E7018

  • 42. 
    An engine-driven generator without a rectifier produces what form of welding current?
    • A. 

      AC only

    • B. 

      DC only

    • C. 

      Both AC and DC

    • D. 

      AC and DCEP

  • 43. 
    Which of the following group of electrodes is low hydrogen type?
    • A. 

      7024, 7027, and 7028

    • B. 

      6010 and 6011

    • C. 

      6012, 6013, and 7014

    • D. 

      7015, 7016 and 7018

  • 44. 
    "Arc blow" is caused by
    • A. 

      Strong winds

    • B. 

      Magnetic forces

    • C. 

      Too high an amperage for the size of the electrode

    • D. 

      Too low an amperage for the size of the electrode

  • 45. 
    "Duty cycle" is a term used to indicate the
    • A. 

      Amount of time a machine is used each day at maximum output

    • B. 

      Percentage of time a machine can operate at maximum in a 10-minute period

    • C. 

      Type of work duty the machine was designed to do by the manufacturer

    • D. 

      Length of time required to cycle

  • 46. 
    When DCEP is used, direction of current flows
    • A. 

      From the work to the electrode

    • B. 

      From the electrode to the work

    • C. 

      Both to and from the electrode

    • D. 

      Depending on the electrode being used

  • 47. 
    Which of the following welding cable sizes is the largest?
    • A. 

      #1/0

    • B. 

      #2

    • C. 

      #1

    • D. 

      #2/0

  • 48. 
    Rectifiers are noted for their ability to
    • A. 

      Control welding power

    • B. 

      Reduce spatter

    • C. 

      Change AC to DC current

    • D. 

      Eliminate arc blow

  • 49. 
    When referring to standard Alternating Current in North America, the current changes direction
    • A. 

      Once per second

    • B. 

      60 times per second

    • C. 

      120 times per second

    • D. 

      Every 1/240th of a second

  • 50. 
    In order to reduce waste and control cost, you should weld until the electrode is
    • A. 

      One half inch from the core wire

    • B. 

      Down to the core wire

    • C. 

      Four (4) inches form the core wire

    • D. 

      Down to the classification numbers

  • 51. 
    In GMAW, the shielding for the molten metal is accomplished through the use of
    • A. 

      Granular flux

    • B. 

      Inert and reactive gases

    • C. 

      Reactive gases only

    • D. 

      Inert gases only

  • 52. 
    GMAW is the abbreviation for?
    • A. 

      Gas Machine Arc Welding

    • B. 

      Gas Method Arc Welding

    • C. 

      Gas Material Arc Welding

    • D. 

      Gas Metal Arc Welding

  • 53. 
    In GMAW, insufficient gas flow can cause?
    • A. 

      Undercut

    • B. 

      Overlap

    • C. 

      Porosity

    • D. 

      Hydrogen cracking

  • 54. 
    A worn contact tube results in
    • A. 

      Poor arc starts

    • B. 

      Ropey welds

    • C. 

      Excessive spatter

    • D. 

      Porosity

  • 55. 
    The benefit of copper coated electrode wires is
    • A. 

      Better arc starts

    • B. 

      Increased contact tip life

    • C. 

      Improved wire feeding

    • D. 

      All of the above

  • 56. 
    What type of power source is used for GMAW?
    • A. 

      Constant Current

    • B. 

      Alternating Current

    • C. 

      Variable Voltage

    • D. 

      Constant Voltage

  • 57. 
    What type of electrode wire is used with GMAW?
    • A. 

      Flux cored

    • B. 

      Solid

    • C. 

      Tubular

    • D. 

      None of the above

  • 58. 
    In GMAW, the amperage is controlled by adjusting the
    • A. 

      Voltage

    • B. 

      Wire feed speed

    • C. 

      Wattage

    • D. 

      Arc length

  • 59. 
    In GMAW, electrode extension is defined as the distance from the
    • A. 

      Nozzle the molten weld pool

    • B. 

      End of the contact tube to the molten weld pool

    • C. 

      Tip of the wire to the molten weld pool

    • D. 

      End of the contact tube to the tip of the wire

  • 60. 
    Which AWS electrode classification is correct for GMAW wire?
    • A. 

      ER70S-3

    • B. 

      E70S-6

    • C. 

      E70-S3

    • D. 

      E71T-1

  • 61. 
    Which of the following is considered an advantage of the GMAW process?
    • A. 

      Higher deposition rates than manual processes

    • B. 

      Easy to use compared to manual processes

    • C. 

      Less electrode waste than with SMAW

    • D. 

      All of the above

  • 62. 
    Electric current is transferred to the electrode through the
    • A. 

      Gun cable liner

    • B. 

      Contact tube

    • C. 

      Wire feed rolls

    • D. 

      Gas diffuser

  • 63. 
    The contact tube should be
    • A. 

      Sized to match the wire diameter

    • B. 

      Slightly smaller than the wire diameter

    • C. 

      1-1/2 times larger than the wire diameter

    • D. 

      2 times larger than the wire diameter

  • 64. 
    What does the 70 indicate in the electrode classification ER70S-3?
    • A. 

      Trade name

    • B. 

      Tensile Strength

    • C. 

      Yield Strength

    • D. 

      Hardness

  • 65. 
    Excessive amounts of weld spatter in the nozzle may cause
    • A. 

      Lack of fusion

    • B. 

      Undercutting

    • C. 

      Poor shielding

    • D. 

      Longitudinal cracks

  • 66. 
    Which of the following is not an advantage of the GMAW process?
    • A. 

      Higher deposition rates

    • B. 

      Relatively easy process for a beginner to learn

    • C. 

      Can be used to weld ferrous and nonferrous metals

    • D. 

      Good for use in windy areas

  • 67. 
    Which shielding gas or gas mixture is most often used for welding carbon steel with the short-circuiting transfer mode?
    • A. 

      100% Argon

    • B. 

      10% Carbon dioxide, 90% Helium

    • C. 

      98% Argon, 2% Oxygen

    • D. 

      75% Argon, 25% Carbon Dioxide

  • 68. 
    The chemical symbol for tungsten is
    • A. 

      T

    • B. 

      Tu

    • C. 

      W

    • D. 

      L

    • E. 

      Tg

  • 69. 
    • A. 

      Stop at the same time the arc is broken

    • B. 

      Long enough to allow the electrode to cool

    • C. 

      At least one minute after the arc is broken

    • D. 

      Long enough to allow the base metal to cool

    • E. 

      Long enough to allow the base metal and electrode to cool

  • 70. 
    When using GTAW to weld Aluminum with Alternating Current (AC), the tip of the tungsten electrode should be
    • A. 

      Tapered

    • B. 

      Tapered with the end slightly blunted

    • C. 

      Rounded at the tip

    • D. 

      Ground at right angles to the grain of the electrode

  • 71. 
    Alternating Current (AC) is used for welding aluminum because
    • A. 

      It produces deeper penetration than Direct Current

    • B. 

      Of the cleaning action and medium penetration of the arc

    • C. 

      AC power is more cost effective than DC power

    • D. 

      Aluminum conducts AC better than DC

    • E. 

      DCEP produces too much penetration on aluminum

  • 72. 
    Which of the following methods is used to start the GTAW arc without touching the base metal?
    • A. 

      Touch start

    • B. 

      High frequency start

    • C. 

      Pulse start

    • D. 

      Lift start

    • E. 

      Scratch start

  • 73. 
    High Frequency current is added to Alternating Current to
    • A. 

      Maintain the arc

    • B. 

      Prevent distortion

    • C. 

      Provide cleaning action

    • D. 

      Refine the grain structure of the weld

  • 74. 
    The shielding gas most commonly used for welding low carbon steel with GTAW is
    • A. 

      Carbon Dioxide

    • B. 

      Argon

    • C. 

      Helium

    • D. 

      A mix of Argon and Helium

  • 75. 
    To remove the oxide layer from aluminum prior to welding you should
    • A. 

      Brush the weld joint with a steel brush

    • B. 

      Brush the weld joint with a stainless steel brush

    • C. 

      Wipe the weld joint with a dry, clean rag

    • D. 

      Aluminum oxides normally do not require removal

  • 76. 
    Tungsten is used for GTAW electrodes because it has which of the following properties?
    • A. 

      High melting point

    • B. 

      Low electrical resistance

    • C. 

      Good heat conductivity

    • D. 

      High electron emission

    • E. 

      All of the above

  • 77. 
    The voltage present when the welding machine power switch is in the ON position, but no welding is taking place is called
    • A. 

      Open-circuit voltage

    • B. 

      Operating voltage

    • C. 

      Arc voltage

    • D. 

      High frequency voltage

  • 78. 
    Filler metal with an AWS classification of ER4043 is used to weld
    • A. 

      Carbon Steel

    • B. 

      Stainless Steel

    • C. 

      Aluminum

    • D. 

      Copper

  • 79. 
    Filler metal with an AWS classification of ER70S-X is used to weld
    • A. 

      Carbon Steel

    • B. 

      Stainless Steel

    • C. 

      Aluminum

    • D. 

      Copper

  • 80. 
    What is the term for the width of the cut produced by any cutting process?
    • A. 

      Drag line

    • B. 

      Kerf

    • C. 

      Wraparound

    • D. 

      Slag

  • 81. 
    The maximum recommended safe working pressure for Acetylene is
    • A. 

      10 pounds per square inch

    • B. 

      15 pounds per square inch

    • C. 

      20 pounds per square inch

    • D. 

      32 pounds per square inch

  • 82. 
    Which oxyacetylene flame has an excess of fuel?
    • A. 

      Oxidizing

    • B. 

      Neutral

    • C. 

      Carburizing

    • D. 

      None of the above

  • 83. 
    The oxyfuel process uses oxygen and what other types of gases?
    • A. 

      Inert Gases

    • B. 

      Reactive Gases

    • C. 

      Mixed gases

    • D. 

      Flammable gases

  • 84. 
    What type of thread and color are fuel gases fittings?
    • A. 

      Right hand - Red

    • B. 

      Left hand-Red

    • C. 

      Right hand - Green

    • D. 

      Left hand - Green

  • 85. 
    • A. 

      Greater than the acetylene working pressure

    • B. 

      Equal to the acetylene working pressure

    • C. 

      Less that the acetylene working pressure

    • D. 

      A constant 20 pounds per square inch