Engineering Materials
The tensile strength of wrought iron is maximum

Perpendicular to lines of slag distribution
Uniform in all directions
Along the lines of slag distribution
None of these

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Engineering Materials
Cobalt in steel

Improves wear resistance, cutting ability and toughness
Improves cutting ability and reduce hardenability
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
Gives ductility, toughness, tensile strength and anti corrosion property

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Engineering Materials
Nickel in steel

Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Gives ductility, toughness, tensile strength and anti-corrosion properties
Improves cutting ability and reduces hardenability
Improves wear resistance, cutting ability and toughness

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Engineering Materials
Free carbon in iron makes the metal

Hard and gives a coarse grained crystalline structure
Soft and gives a fine grained crystalline structure
Soft and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure

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