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  • Question

  • The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)


  • Options
  • A. t
  • B. 1.5 t
  • C. 3 t
  • D. 6 t

  • Correct Answer
  • 6 t 

    • Workshop Technology problems

    Search Results

    • 1. When the weld is made from left to right, it is known as back-hand welding.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 2. In spot welding, the spacing between two spot weld should not be less than

    • Options
    • A. d
    • B. 1.5 d
    • C. 3 d
    • D. 6 d
      • Discuss
    • 3. The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The addition of magnesium to cast iron increases its

    • Options
    • A. hardness
    • B. ductility and strength in tension
    • C. corrosion resistance
    • D. creep strength
      • Discuss
    • 5. Steel containing 0.8 to 1.5% carbon, is known as

    • Options
    • A. mild steel
    • B. dead mild steel
    • C. medium carbon steel
    • D. high carbon steel
      • Discuss
    • 6. If the sand is too fine, its permeability will be high.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The cold working of metals is carried out

    • Options
    • A. at the recrystallisation temperature
    • B. below the recrystallisation temperature
    • C. above the recrystallisation temperature
    • D. at any temperature
      • Discuss
    • 8. The current in electric resistance welding can be regulated by

    • Options
    • A. varying the input supply
    • B. changing the primary turns of the transformer
    • C. changing the secondary turns of the transformer
    • D. any one of the above
      • Discuss
    • 9. Cold working requires much higher pressure that hot working.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. An oxidising process used for aluminium and magnesium articles is called

    • Options
    • A. galvanising
    • B. anodising
    • C. parkerising
    • D. sheradising
      • Discuss

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