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Engineering Materials

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

Malleability
Elasticity
Ductility
Plasticity

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Engineering Materials
Monel metal contains

Malleable iron and zinc
88% copper and 10% tin and rest zinc
Alloy of tin, lead and cadmium
63 to 67% nickel and 30% copper

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Engineering Materials
Lead is poured into the joint between two pipes. These pipes may be made of

Concrete
Asbestos cement
Cast iron
Vitrified clay

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Engineering Materials
In grey cast iron, carbon is present in the form of

Spheroids
Cementite
Free carbon
Flakes

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Engineering Materials
The percentage of carbon in grey iron castings usually varies between

0.5 to 1%
2.5 to 4.5%
0.012
5 to 7%

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Engineering Materials
A reversible change in the atomic structure of steel with corresponding change in the properties is known as

Physical change
Molecular change
Allotropic change
Solidus change

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