Welding - Welding objective questions and answers

1. In resistance welding,the pressure is released .......

   A.Just at time of passing the current

   B.After completion of current

   C.After the weld cools

   D.During heating periods

2. Weaving in arc welding refers to.......

   A.Side to side motion of electrode at right angles to the direction of the welding

   B.Side to side motion of electrode along the direction of the welding

   C.Spiral motion given to electrode

   D.A technique of striking the arc

3. The widest application of laser welding is.......

   A.Heavy industry

   B.Structural work

   C.Process industry

   D.Electronic industry

4. In arc welding operations the current value is decided by......

   A.The thickness of plate

   B.Length of welded portion

   C.Voltage across the arc

   D.Size of the electrode

5. The mixture of iron oxide and aluminium oxide are used in thermit welding is.......

   A.1:1

   B.1:3

   C.3:1

   D.Mixture of different oxide

   E.None of the above

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