The electrode size refers to

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 3
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  1. Diameter of its core wire
  2. Diameter (overall) of electrode
  3. Thickness of flux coating
  4. Length of electrode

Answer (Detailed Solution Below)

Option 1 : Diameter of its core wire
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Explanation:

  • The electrode size refers to the diameter of its core wire and each electrode has a certain current range.
  • The welding current increases with the electrode size (diameter).
  • The length of electrodes may depend on diameter of the core wire ranging from 250 to 450 mm i.e. larger the core diameter larger the length.
  • The electrodes are also specified based on the ratio of the diameter of the coated portion of the electrode to core wire diameter.
    • If the ratio is less than 1.2 then electrodes are thin coated.
    • If the ratio ranges between 1.2 to 1.5 then medium coated.
    • If the ratio exceeds 1.5 then electrodes are heavy-coated or thick coated.
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