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Engineering Materials

Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Plasticity
Ductility
Elasticity
Malleability

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Engineering Materials
Eutectoid steel contains following percentage of carbon

0.003
0.008
0.0002
0.0063

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Engineering Materials
Sulphur in cast iron

Makes the iron soft and easily machinable
Increases hardness and brittleness
Aids fusibility and fluidity
Make the iron white and hard

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Engineering Materials
The silicon steel is widely used for

Generators and transformers in the form of laminated cores
Motor car crankshafts
Connecting rods
Cutting tools

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

Copper
Silicon
Lead and bismuth
Magnesium

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

Does not effect
None of these
Lowers
Raises

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