Which of the following welding is done in a high vacuum chamber?

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ISRO VSSC Technician-B Fitter 02 June 2019 Official Paper
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  1. Electron Beam Welding
  2. Arc welding
  3. Laser welding
  4. TIG welding

Answer (Detailed Solution Below)

Option 1 : Electron Beam Welding
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ISRO Technician B: Fitter Full Test 1
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Detailed Solution

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Electron Beam Welding

  • Electron beam welding joins metals by bombarding a specific confined area of the base metal with high velocity electrons.
  • The operation is performed in a vacuum to prevent the reduction of electron velocity.
  • It allows fusion welds of great depth with a minimum width because the beam can be focused and magnified.

Additional Information

  • Tungsten Inert Gas (TIG) or Gas Tungsten Arc (GTA) welding is the arc welding process in which arc is generated between non-consumable tungsten electrode and workpiece.

Laser Welding

  • LASER is the acronym for Light Amplification by Stimulated Emission of Radiation. Laser Welding is a method in which workpiece is melted and joined by narrow beam of intense Monochromatic Light.
  • (Laser Beam) When the beam strikes the job, the heat produced melts and fuses even the hardest materials.

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