Engineering Materials
Which of the following has highest specific strength of all structural materials?

Titanium alloys
Chromium alloys
Magnetic steel alloys
Magnesium alloys

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Engineering Materials
Pick up wrong statement about wrought iron

It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It is very soft and ductile
It melts at 1535°C
It contains carbon of the order of 0 to 0.25%

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Engineering Materials
Combined carbon in iron makes the metal

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

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