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Mechanical Engineering Objective Questions { Material Science }



22. Pig iron is the name given to
A.Raw material for blast furnace
B.Product of blast furnace made by reduction of iron ore
C.Iron containing huge quantities of carbon
D.Iron in molten form in the ladles

23. The unique property of cast iron is, its high
A.Malleability
B.Ductility
C.Surface finish
D.Damping characteristics

24. Cast iron is characterized by minimum of following %age of carbon
A.0.2%
B.0.8%
C.1.3%
D.2%

25. In grey cast iron, carbon is present in the form of
A.Cementite
B.Free carbon
C.Flakes
D.Spheroids

26. In nodular iron, graphite is in the form of
A.Cementite
B.Free carbon
C.Flakes
D.Spheroids

27. In malleable iron, carbon is present in the form of
A.Cementite
B.Nodular aggregates of graphite
C.Flakes
D.Spheroids

28. Wrought iron is
A.Hard
B.High in strength
C.Highly resistant to corrosion
D.Heat treated to change its properties

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