Upset butt welding is generally NOT used for manufacturing of _______

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 3
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  1. Welding bar
  2. tubing’s
  3. rods
  4. Automobile parts

Answer (Detailed Solution Below)

Option 4 : Automobile parts
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Explanation:

  • It is utilized to join the metal pieces end to end.
  • In this technique, the parts to be welded, usually bars and rods of the same cross-sectional area, are clamped edge to edge in copper jaws of the welding machine which acts as electrode clamps.
  • One of the electrodes is fixed and the other is movable.
  • The two ends of the workpieces are butted together in a solid contact so that their contact surface forms a locality of high electric resistance, while current flows to heat the joint quickly.
  • At the point/surface of contact, the pressure applied upsets or forges the parts together.
  • This process is suitable for welding non-ferrous materials in the shape of formed parts, tubes, bars, and rods.
  • The voltage required is 2-8 V and the current required ranges from 50 A to several hundred amperes depending upon material and the area to be welded at a time

=F1 Krupalu Madhu 21.09.20 D12

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