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Discussion :: Heating and Welding

  1. By which of the following methods the temperature inside arcane can be varied?

    2. A.

     By disconnecting some of the heating elements
    B.

     By varying the operating voltage
    C.

     By varying the current through heating elements
    D.

     By any of the above method

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    Answer : Option D

    Explanation :

    Explanation Not Provided

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