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Engineering Materials

Engineering Materials
Iron ore is usually found in the form of

Oxides
All of these
Carbonates
Sulphides

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Engineering Materials
Bronze contains

90% copper and 10% tin
70 - 75% copper and rest tin
70% copper and 30% zinc
85 - 92% copper and rest tin with little lead and nickel

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Engineering Materials
Wrought iron

Is a ductile material
Cannot stand sudden and excessive shocks
Can be easily forged or welded
All of these

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Engineering Materials
Age hardening is related to

Brass
Copper
Duralumin
Silver

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Engineering Materials
Process of Austempering results in

Formation of bainite structure
Lamellar layers of carbide distributed throughout the structure
Martenistic structure
Carburised structure

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

Lowers
Raises
Does not effect
None of these

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