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Engineering Materials

Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

Line defect
None of these
Point defect
Surface defect

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Engineering Materials
A small percentage of boron is added to steel in order to

Increase wear resistance
Reduce machinability
Increase hardenability
Increase endurance strength

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Engineering Materials
Cast iron is a

Ductile material
Tough material
Brittle material
Malleable material

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Engineering Materials
The percentage carbon content in wrought iron is about

0.02
0.4
0.1
2

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.55 to 1.0%
0.20 to 0.45%
0.05 to 0.20%
0.45 to 0.55%

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Engineering Materials
The material in which the atoms are arranged chaotically, is called

Crystalline material
Mesomorphous material
None of these
Amorphous material

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