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Engineering Materials

Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Magnesium
Silicon
Copper
Lead and bismuth

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Engineering Materials
Induction hardening is the process of

Heating and cooling rapidly
Increasing hardness throughout
Hardening surface of work-piece to obtain hard and wear resistant surface
Inducing hardness by continuous process

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Engineering Materials
The blade of a power saw is made of

Malleable cast iron
Boron steel
High speed steel
Stainless steel

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Engineering Materials
Sulphur in steel

Lowers the toughness and transverse ductility
Reduces the grain size
Acts as deoxidiser
Decreases tensile strength and hardness

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Engineering Materials
Beryllium bronze contains

80% copper and 20% beryllium
99% copper and 1% beryllium
60% copper and 40% beryllium
97.75% copper and 2.25% beryllium

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Engineering Materials
Cupola produces following material

Cast iron
Wrought iron
Malleable iron
Pig iron

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