Welding - Welding objective questions and answers


26. The following flux is used for brazing brass, copper, bronze and low carbon steels.......


   A.Mixture of boric acid, borux and a wetting agent

   B.Boric acid, borax or fluoride with a wetting agent

   C.Chlorides and fluorides mixed with water

   D.All of the above


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A.Mixture of boric acid, borux and a wetting agent

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27. The following flux is used for brazing cast iron.......


   A.Mixture of boric acid, borux and a wetting agent

   B.Boric acid, borax or fluoride with a wetting agent

   C.Chlorides and fluorides mixed with water

   D.All of the above


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B.Boric acid, borax or fluoride with a wetting agent

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28. Oxygen to acetyline ratio in case of oxidising flame is.......


   A.1:1

   B.1.2:1

   C.1.5:1

   D.2:1


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C.1.5:1

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29. Acetylene gas is generated form of......


   A.Carbon

   B.Calcium

   C.Calcium carbonate

   D.Calcium carbide


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D.Calcium carbide

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30. Acetelyne is stored in gas cylinder in.......


   A.In gaseous form

   B.In liquid form

   C.In solid form

   D.Under high pressure


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B.In liquid form

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