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Engineering Materials

Engineering Materials
Silicon when added to copper improves

Hardness
Strength and ductility
Hardness and strength
Machinability

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Engineering Materials
An engineer's hammer is made of

High carbon steel
Cast iron
Forged steel
Mild steel

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Engineering Materials
Which of the following impurity in cast iron makes it hard and brittle?

Manganese
Phosphorus
Silicon
Sulphur

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Engineering Materials
Steel with __________ carbon is known as hypo-eutectoid steel.

Above 0.8%
Below 0.8%
0.008
None of these

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Engineering Materials
The heat treatment process used for softening hardened steel is

Normalizing
Tempering
Carburising
Annealing

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

None of these
Does not effect
Raises
Lowers

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