Practice Quiz On Electric Welding

20 Questions | Total Attempts: 2503

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Practice Quiz On Electric Welding

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Questions and Answers
  • 1. 
    The basic electrical requirement in arc welding is that there should be
    • A. 

      Coated electrodes

    • B. 

      High open-circuit voltage

    • C. 

      No arc blow

    • D. 

      Dc power supply

  • 2. 
    Welding is not done directly from the supply mains because 
    • A. 

      It is customary to use welding machines

    • B. 

      Its voltage is too high

    • C. 

      Its voltage keeps fluctuating

    • D. 

      It is impractical to draw heavy currents

  • 3. 
    AC welding machine cannot be used for ____ welding. 
    • A. 

      MIG

    • B. 

      Atomic hydrogen

    • C. 

      Resistance

    • D. 

      Submerged arc

  • 4. 
    In electrical welding, arc blow can be avoided by 
    • A. 

      Using bare electrodes

    • B. 

      Welding away from earth ground connection

    • C. 

      Using ac welding machines

    • D. 

      Increasing arc length

  • 5. 
    In DCSP welding 
    • A. 

      Electrode is the hottest

    • B. 

      Workpiece is relatively cooler

    • C. 

      Base metal penetration is deep

    • D. 

      Heavily-coated electrodes are used

  • 6. 
    Overhead welding position is thought to be the most ______. 
    • A. 

      Hazardous

    • B. 

      Difficult

    • C. 

      Economical

    • D. 

      Useful

  • 7. 
    The ultimate aim of using electrode coating is to 
    • A. 

      Prevent atmospheric contamination

    • B. 

      Improve bead quality

    • C. 

      Cleanse the base metal

    • D. 

      Provide shieding to weld pool

  • 8. 
    In electrode-positive welding, _____ of the total heat is produced at the electrode. 
    • A. 

      One-third

    • B. 

      Two-third

    • C. 

      One-half

    • D. 

      One-fourth

  • 9. 
    Submerged arc process is characterized by 
    • A. 

      Deep penetration

    • B. 

      High welding current

    • C. 

      Exceptionally smooth beads

    • D. 

      All of the above

  • 10. 
    The major disadvantage of carbon arc welding is that 
    • A. 

      There is occurence of blow holes

    • B. 

      Electrodes are consumed fast

    • C. 

      Separate filler rod is needed

    • D. 

      Bare electrodes are necessary

  • 11. 
    . In atomic hydrogen welding, electrodes are long lived because 
    • A. 

      Two are used at a time

    • B. 

      Arc is in the shape of a fan

    • C. 

      Ac supply is used

    • D. 

      it is a non-pressure process

  • 12. 
    Unlike TIG welding, MIG welding 
    • A. 

      Requires no flux

    • B. 

      Uses consumable electrodes

    • C. 

      Provides complete protection from atmospheric contamination

    • D. 

      Requires no post-weld cleansing

  • 13. 
    The major power supply used in MIG welding is 
    • A. 

      Ac supply

    • B. 

      DCSP

    • C. 

      Electrode-negative

    • D. 

      DCRP

  • 14. 
    MIG welding process is becoming increasingly popular in welding industry mainly because of 
    • A. 

      Its easy operation

    • B. 

      Its high metal deposit rate

    • C. 

      Its use in both ferrous and non-ferrous metals

    • D. 

      Both its easy operation and its high metal deposit rate

  • 15. 
    A weld bead of wineglass design is produced in _____ welding. 
    • A. 

      Plasma arc

    • B. 

      Laser

    • C. 

      Electron beam

    • D. 

      MAG

  • 16. 
    Spot welding process basically depends on 
    • A. 

      Ohmic resistance

    • B. 

      Generation of heat

    • C. 

      Application of forging pressure

    • D. 

      Generation of heat and application of forging pressure

  • 17. 
    Electric resistance seam welding uses _____ electrodes. 
    • A. 

      Pointed

    • B. 

      Disc

    • C. 

      Flat

    • D. 

      Domed

  • 18. 
    Projection welding can be regarded as a mass production form of ______ welding. 
    • A. 

      Seam

    • B. 

      Butt

    • C. 

      Spot

    • D. 

      Upset

  • 19. 
    In the process of electroslag welding, theoretically there is no upper limit to the 
    • A. 

      Thickness of weld lead

    • B. 

      Rate of metal deposit

    • C. 

      Slag bath-temperature

    • D. 

      Rate of slag consumption

  • 20. 
    High temperature metals like columbium can be easily welded by _____ welding. 
    • A. 

      Flash

    • B. 

      MIG

    • C. 

      TIG

    • D. 

      Electron beam

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