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Engineering Materials

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

Malleability
Elasticity
Plasticity
Ductility

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

1400 to 1539°C
910 to 1440°C
770 to 910°C
Below 723°C

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Engineering Materials
The molecules in a solid move

In a random manner
Back and forth like tiny pendulums
In circular motion
In a haphazard way

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Engineering Materials
Muntz metal contains copper and zinc in the ratio of

2.1180555555556
2.5277777777778
0.88888888888889
40 : 60

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Engineering Materials
The hardness of steel increases if it contains

Austenite
Martensite
Cementite
Pearlite

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

Manganese
Sulphur
Phosphorus
Silicon

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