Q.1
What is the maximum strength of mild steel arc welds on addition of microelements in the slag?
  • a) 53 kgf/mm2
  • b) 49 kgf/mm2
  • c) 57kgf/mm2
  • d) 61 kgf/mm2
Q.2
In which run weld, in ordinary steels, the grain refinement takes place?
  • a) First
  • b) Second
  • c) Third
  • d) Fourth
Q.3
What is the minimum strength of mild steel arc welds on addition of microelements in the slag?
  • a) 43 kgf/mm2
  • b) 39 kgf/mm2
  • c) 45kgf/mm2
  • d) 48 kgf/mm2
Q.4
Which of the following is affected by weld contour?
  • a) Fatigue
  • b) Creep
  • c) High pressure property
  • d) Low pressure property
Q.5
Thermite contains which metal?
  • a) Zinc
  • b) Copper
  • c) Aluminium
  • d) Manganese
Q.6
Which of the following property is considered for controlling the porosity of the metal?
  • a) Solid solubility
  • b) Liquid solubility
  • c) Gas solubility
  • d) Flame solubility
Q.7
Slag used in fusion welding contains manganese.
  • a) True
  • b) False
Q.8
Which of the following property is responsible for weld metal cracking?
  • a) Stress
  • b) Strain
  • c) Temperature conditions
  • d) Pressure conditions
Q.9
A thermit reaction produces heat up to what temperature?
  • a) 4800°F
  • b) 4000°F
  • c) 5600°F
  • d) 5300°F
Q.10
Slag used in fusion welding has nitrogen.
  • a) True
  • b) False
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