Multiple choice

The rails are welded by

  1. thermit welding

  2. gas welding

  3. arc welding

  4. MIG welding
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A Correct answer
Explanation

Thermit welding is the traditional and still widely used method for welding rails in track maintenance. It uses an exothermic reaction between aluminum powder and iron oxide to produce molten steel that fuses the rail ends. While flash butt welding is used in continuous welded rail (CWR) production, thermit welding remains the standard for field welds and repairs.

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