Basic Welding Knowledge test

- May 14, 2017 -

Questions and Answers

  • 1. 

    What is an "inert gas" as used in Metal Inert Gas (MIG) Welding?

    • A. 

      A gas that cools the weld zone to prevent cracking.

    • B. 

      A gas that prevents porosity by burning a hot neutral flame.

    • C. 

      A gas that does not chemically react with other elements to help produce a quality weld.

    • D. 

      A gas that heats up the weld zone to create a better quality weld.

  • 2. 

    Stick (Arc) Welding uses a coated electrode, what is the purpose of this coating?

    • A. 

      The coating insulates the welder from electric shocks.

    • B. 

      The coating helps clean the weld zone from contaminates such as rust or paint.

    • C. 

      The coating prevents water from damaging the electrode.

    • D. 

      The coating produces a protective gas to prevent porosity.

  • 3. 

          Which weld procedure is safe to perform in wet conditions?      

    • A. 

      Oxy Welding

    • B. 

      Arc Welding

    • C. 

      MIG Welding

    • D. 

      TIG Welding

  • 4. 

    What is the minimum recommended filter shade on a welding helmet to protect your eyes?

    • A. 

      Shade 10

    • B. 

      Shade 13

    • C. 

      Shade 5

    • D. 

      Clear lens

  • 5. 

     What type of respiratory protection is the minimum required when welding? 

    • A. 

      Dust mask

    • B. 

      P2 Respirator

    • C. 

      No protection is required

    • D. 

      Hazmat suit

  • 6. 

    How would you prepare heavily rusted mild steel for welding?

    • A. 

      Wash with soap and water

    • B. 

      Grind back to bare metal

    • C. 

      Nothing, I would weld over it

    • D. 

      Give it a light sand with 240 grit sandpaper

  • 7. 

    What type of weld would you do to form a T shape between two pieces of flat bar?

    • A. 

      Butt

    • B. 

      Fillet

    • C. 

      Edge

    • D. 

      Outside Corner

  • 8. 

    Which of the following is an advantage of MIG welding.

    • A. 

      It works well in the wind.

    • B. 

      You can safely weld in wet conditions with it

    • C. 

      It takes less operator skill than other weld types

    • D. 

      It is slow and accurate which is good for very thin metal

  • 9. 

    How would you prepare 25mm low carbon steel flat bar for a butt weld?

    • A. 

      Give it a quick grind to make sure the metal is clean

    • B. 

      Grind a single bevel preparation

    • C. 

      Nothing

    • D. 

      Grind a double V preparation

  • 10. 

    What two items on a MIG welder would need to be changed when changing from 0.9mm mild steel wire electrode to 1.2mm mild steel wire electrode?

    Discuss

    • A. 

      Contact tip and shroud

    • B. 

      Contact tip and drive rollers

    • C. 

      Gas diffuser and drive rollers

    • D. 

      Gas bottle and earth clamp

  • 11. 

    What treatment is recommended after welding stainless steel?

    • A. 

      No treatment required for stainless

    • B. 

      Quench in water to remove oxides

    • C. 

      Apply pickling paste

    • D. 

      Oil to stop rust

  • 12. 

    When performing a fillet weld between two pieces of 5mm thick mild steel, what is the recommended size (leg length) of the weld? (when not given a size)

    • A. 

      5mm

    • B. 

      10mm

    • C. 

      7.5mm

    • D. 

      3mm

  • 13. 

    If you found a tool to be faulty or dangerous what should you do?

    • A. 

      Put it back in the store

    • B. 

      Only use it one more time, then get it fixed

    • C. 

      Take it out of service, report it and if required, tag it

    • D. 

      Do nothing

  • 14. 

    Why shouldn't you wear nylon clothing when welding?

    • A. 

      Because you will get too sweaty

    • B. 

      It is fine to wear

    • C. 

      Because static electricity can build up cause shocks

    • D. 

      Because it can catch fire easily and melt to your skin


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