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  1. Which of the following welding method uses a pool of molten metal?

    2. A.

     Carbon arc welding
    B.

     Submerged arc welding
    C.

     TIG arc welding
    D.

     MIG arc welding

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    Answer : Option B

    Explanation :

    This is a well established and extremely versatile method of welding. Submerged-arc welding (SAW) involves the formation of an arc between a continuously fed electrode and the work piece.
    A blanket of powdered flux, which generates a protective gas shield and a slag (and may also be used to add alloying elements to the weld pool), protects the weld zone. A shielding gas is not required.

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