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Engineering Materials

Engineering Materials
Hardness of martensite is about

RC 48
RC 65
RC 57
RC 80

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Engineering Materials
The material in which the atoms are arranged regularly in some directions but not in others, is called

Crystalline material
None of these
Amorphous material
Mesomorphous material

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Engineering Materials
There are fourteen atoms in a unit cell of

None of these
Body centered cubic space lattice
Close packed hexagonal space lattice
Face centered cubic space lattice

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Engineering Materials
The presence of sulphur in pig iron makes

The casting unsound
It easily machinable
It hard
It brittle

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Engineering Materials
The hardness of steel increases if it contains

Cementite
Martensite
Pearlite
Austenite

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Engineering Materials
Silicon when added to copper improves

Strength and ductility
Hardness
Machinability
Hardness and strength

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