Engineering Materials
Which is false statement about properties of aluminium?

Modulus of elasticity is fairly low
Wear resistance is very good
Creep strength limits its use to fairly low temperatures
Fatigue strength is not high

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Engineering Materials
Free carbon in iron makes the metal

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

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Engineering Materials
Grey cast iron

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable
Is produced by annealing process. I is soft, tough and easily machined metal
Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

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