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  1. Continuity of electric current across welded rail joints, is maintained by
    2. A.
    welding ends of a wire to each rail
    B.
    placing an insulated plate underneath the rails
    C.

    placing insulation in expansion gaps
    D.

    none of these.

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    Workspace

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    Answer : Option D

    Explanation :

    No answer description available for this question.

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