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Engineering Materials

Engineering Materials
Crystal structure of a material is, generally, examined by

Metallurgical microscope
Optical microscope
Naked eye
X-ray techniques

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Engineering Materials
Delta iron occurs at temperature of

Between 1400°C and 1539°C
Between 910°C and 1400°C
Above melting point
Room temperature

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Engineering Materials
White cast iron contains carbon in the form of

Cementite
Free carbon
Graphite
White carbon

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

Allotropic change
Molecular change
Physical change
Solidus change

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Engineering Materials
Vanadium in high speed steels

Forms very hard carbides and thus increases wear resistance
Promotes decarburisation
Promotes retention of austenite
Provides high hot hardness

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Engineering Materials
An engineer's hammer is made of

Mild steel
Cast iron
High carbon steel
Forged steel

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