MMAW: Trivia Questions On Manual Metal ARC Welding Process! Quiz

27 Questions | Total Attempts: 331

SettingsSettingsSettings
Please wait...
MMAW: Trivia Questions On Manual Metal ARC Welding Process! Quiz

.


Questions and Answers
  • 1. 
    In the process of electric welding an arc is maintained between:
    • A. 

      The parent metal and the positive lead

    • B. 

      The electrode and the negative lead

    • C. 

      The parent metal and an electrode

    • D. 

      The positive lead and the electrode

  • 2. 
    Which of the following would generally require a lower amperage
    • A. 

      Welding thick plate

    • B. 

      Welding thin plate

    • C. 

      A high welding rate

    • D. 

      Deep penetration of the weld material

  • 3. 
    Size of electrodes used depends only on the type of joint to be welded, irrespective of the thickness of the material
    • A. 

      True

    • B. 

      False

  • 4. 
    What is the approximate angle that the electrode should make with the weld surface?
    • A. 

      45-50 degrees

    • B. 

      65-70 degrees

    • C. 

      80-85 degrees

    • D. 

      30-35 degrees

  • 5. 
    What are the four requirements that must be met for maximum strength to be achieved in a welded joint.
    • A. 

      Good fusion over the whole of the weld

    • B. 

      Penetration of the weld metal through the full thickness of the parent metal

    • C. 

      Penetration of the weld metal through half the thickness of the parent metal

    • D. 

      Slight reinforcement of the weld above the parent metal

    • E. 

      No entrapped slag

    • F. 

      Amperage quite high

  • 6. 
    A flux-covered electrode provides filler metal in the arc welding process.
    • A. 

      True

    • B. 

      False

  • 7. 
    Which of the following statements best describes the MMAW process
    • A. 

      The core wire of the electrode melts and mixes with the parent metal

    • B. 

      The core wire of the electrode melts and falls on top of the parent metal

    • C. 

      The core wire of the electrode melts and replaces the parent metal

    • D. 

      None of these statements accurately describe the MMAW process

  • 8. 
    A 'cup' is formed at the electrode tip as the core wire melts more quickly than the flux coating. This assists in directing the molten droplets of filler metal to the required spot.
    • A. 

      True

    • B. 

      False

  • 9. 
    If a small welder had a duty cycle of 25% over 5 minutes, that means:
    • A. 

      In any 5 minute period you can only weld once for 1 minute 15 seconds

    • B. 

      The welder must be left to cool for 3 minutes 45 seconds after every weld

    • C. 

      In any 5 minute period the total welding time should not exceed 1 minute 15 seconds

    • D. 

      The welder will not need cooling if you do not weld for more than 1 minute 15 seconds at a time

  • 10. 
    What is the difference between a 15 amp plug and a 10 amp plug?
    • A. 

      10 amp plug has a larger earth pin

    • B. 

      15 amp plug has a larger earth pin

    • C. 

      10 amp plugs are always black

    • D. 

      15 amp plugs are always black

  • 11. 
    Large electrodes can burn holes through the parent metal if they are used on thin material.
    • A. 

      True

    • B. 

      False

  • 12. 
    What is the purpose of the coating on an arc welding electrode?
    • A. 

      Provides a protective gaseous shield for the molten weld metal

    • B. 

      Provides a cleaning action on the workpiece and a protective slag cover over the solidifying weld metal

    • C. 

      Helps to stabilise the arc and removes oxygen from the weld metal

    • D. 

      All of these options are correct

  • 13. 
    The illustration shows 3 effects of amperage that is too high. What are they?
    • A. 

      Excessive Spatter

    • B. 

      Undercut

    • C. 

      Poor Penetration

    • D. 

      Flattened Bead

    • E. 

      Weld Porosity

    • F. 

      Thick Weld

  • 14. 
    It is difficult to maintain the arc and to prevent the electrode from sticking when the amperage is too high.
    • A. 

      True

    • B. 

      False

  • 15. 
    The single V butt joint is used for material up to 15mm thick.
    • A. 

      True

    • B. 

      False

  • 16. 
    What is the name given to the welds that are used to form joints such as this T joint?
    • A. 

      Butt Welds

    • B. 

      Filler Welds

    • C. 

      Vertical Welds

    • D. 

      Fillet Welds

  • 17. 
    What is the name of this joint?
    • A. 

      Single V Butt

    • B. 

      Double V Butt

    • C. 

      Chamfered Butt

    • D. 

      Double V Fillet

  • 18. 
    What are the possible causes of undercut?
    • A. 

      Amperage too high

    • B. 

      Amperage too low

    • C. 

      Arc too long

    • D. 

      Arc too short

    • E. 

      Electrode too inclined to the face of the work

    • F. 

      Electrode too large

    • G. 

      Parent metal too clean

  • 19. 
    Which of the following is a common cause of incomplete penetration?
    • A. 

      Amperage too low

    • B. 

      Amperage too high

    • C. 

      Electrode too small for the joint

    • D. 

      Parent metal too soft

  • 20. 
    Slag inclusion is where slag is trapped in a weld. Which of the following statements is not correct?
    • A. 

      Slag inclusions can be caused by poor joint preparation

    • B. 

      Lack of penetration can cause slag inclusions

    • C. 

      Slag inclusions tend to increase the strength of the welded joint

    • D. 

      Slag inclusions can occur if weld metal is deposited in an irregular manner

  • 21. 
    What are five possible causes of lack of fusion?
    • A. 

      Electrode too small for the job

    • B. 

      Electrode too thick for the job

    • C. 

      Amperage too low

    • D. 

      Amperage too high

    • E. 

      Wrong electrode angle

    • F. 

      Wrong speed of travel

    • G. 

      Scale or dirt on the joint surface

    • H. 

      Angles not cut accurately

    • I. 

      Power turned off

    • J. 

      Earth lead not connected

    • K. 

      Wet electrodes

  • 22. 
    Distortion occurs when the metal contracts (shrinks) from its molten (hot liquid) state to atmospheric temperature.
    • A. 

      True

    • B. 

      False

  • 23. 
    Varying rates of expansion and contraction in different parts of the job generally do not cause distortion.
    • A. 

      True

    • B. 

      False

  • 24. 
    Distortion can be limited by:
    • A. 

      All of these are correct

    • B. 

      Pre-setting parts out of position

    • C. 

      Pre-heating areas of metal away from the joint

    • D. 

      Tack welding or clamping parts of the job

  • 25. 
    The ventilation or extraction system in a welding booth should be switched off as soon as you have finished welding.
    • A. 

      True

    • B. 

      False

Back to Top Back to top