1. . Puddling process is for converting:
(A) Pig iron to steel
(B) Mild steel to alloy steel
(C) Pig iron to wrought iron
(D) None of these
2. . Properties of wrought iron are determined by:
(A) Carbon and Magnesium
(B) Magnesium and Manganese
(C) Aluminum and Carbon content
(D) Carbon and Manganese
3. . In wrought iron, Manganese is below:
(A) 0.1%
(B) 0.2%
(C) 1.5%
(D) 0.06%
4. . Older puddling furnaces had:
(A) Straight roof
(B) Flat roof
(C) Arched roof
(D) None of these
5. . Wrought iron can be used for:
(A) Barbed wire
(B) Cans
(C) Plate
(D) None of these
6. . Pig iron contains ____ iron:
(A) 50%
(B) 65%
(C) 75%
(D) 90%
7. . Pure iron __________ pig iron ore malleable iron:
(A) Is harder than
(B) Has higher corrosion resistance than
(C) Melts at lower temperature than
(D) None of these
8. . The active metal mixture also does:
(A) Melting
(B) Refining
(C) Iron ore reduction
(D) De-oxidation
9. . Pure iron becomes __________ when carbon is added:
(A) Extremely tough
(B) Hard
(C) Ductile
(D) None of these
10. . Carbon steel contains less than __________ carbon:
(A) 1%
(B) 1.5%
(C) 1.7%
(D) 1.8%