Engineering Materials
Which is false statement about properties of aluminium?

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

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Engineering Materials
Cyaniding is the process of

Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
Reacting steel surface with cyanide salts
Obtaining cyanide salts
Dipping steel in cyanide bath

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Engineering Materials
Carbon steel is

An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Extensively used for making cutting tools
Made by adding carbon in steel
Refined from cast iron

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Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

The converter must be titled to remove the contents of the converter
The brown smoke does not occur during the operation of a Bessemer converter
Silicon and manganese has burnt and carbon has started oxidizing
Air is burning out silicon and manganese

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Engineering Materials
A coarse grained steel

Is more ductile and has a greater tendency to distort during heat treatment
Is less tough and has a greater tendency to distort during heat treatment
Is less tough and has a less tendency to distort during heat treatment
Is more ductile and has a less tendency to distort during heat treatment

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