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  1. The advantage of Thermit welding is that

    2. A.

     All parts of the weld section are molten at the same time
    B.

     Weld cools almost uniformly
    C.

     Results in a minimum problem with internal residual stresses
    D.

     All of the above

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    Answer : Option D

    Explanation :

    Advantages of thermit welding is listed below:
    the weld formed has high mechanical strength,
    excellent corrosion resistance as compared with other forms of weld.
    It is highly stable to repeated short circuit pulses
    the electrical resistance remains unchanged over lifetime of the installation
    All parts of the weld section are molten at the same time
    Weld cools almost uniformly
    Results in a minimum problem with internal residual stresses

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