Q:- Which of the following processes use a constant characteristic :

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  1. Sub-arc < 1000 amps, MMA, Electro slag.
  2. TIG / TAG, Sub-arc > 1000 amps, Electro slag.
  3. Sub-arc < 1000 amps, MIG / MAG, Electro slag.
  4. MIG / MAG, Sub-arc > 1000 amps, Electro Slag.

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