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Engineering Materials

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

Malleability
Plasticity
Ductility
Elasticity

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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
The machinability of steel is improved by adding

Nickel and chromium
Sulphur, lead and phosphorus
Chromium
Nickel

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Engineering Materials
Nickel when added to copper improves

Hardness and strength
Machinability
Hardness
Strength and ductility

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Engineering Materials
The presence of hydrogen in steel causes

Embrittlement
Reduced neutron absorption cross-section
Improved Weldability
Corrosion resistance

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Engineering Materials
Which of the following constituents of steels is softest and least strong?

Pearlite
Ferrite
Cementite
Austenite

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