Welding - Welding objective questions and answers

21. Which of the following carbon steel is most weldable.......

   A.0.15 % carbon steel

   B.0.30 % carbon steel

   C.0.50 % carbon steel

   D.0.75 % carbon steel

   E.1.00 % carbon steel

22. The temperature of plasma tourch is of the order of.......

   A.1000 ^oC

   B.5000 ^oC

   C.10000 ^oC

   D.33000 ^oC

   E.75000 ^oC

23. Arc welding in arc welding should be nearly equal to.......

   A.Diameter of electrode rod (d)

   B.1.5 d

   C.2 d

   D.3 d

   E.4 d

24. Arc length in arc welding should be equal to......

   A.Half the diameter of electrode rod

   B.Rod diameter

   C.Twice the rod diameter

   D.2.5 times the rod diameter

   E.None of the above

25. Arc stability is better with.......

   A.AC welding

   B.DC welding

   C.Both AC with DC welding

   D.Specially designed wave forms

   E.Rectified supply

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