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

Amorphous material
Crystalline material
Mesomorphous material
None of these

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Engineering Materials
Cobalt in steel

Gives ductility, toughness, tensile strength and anti corrosion property
Improves cutting ability and reduce hardenability
Improves wear resistance, cutting ability and toughness
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

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Engineering Materials
Thermoplastic materials are those materials which

Do not become hard with the application of heat and pressure and no chemical change occurs
Are used as a friction lining for clutches and brakes
Are flexible and can withstand considerable wear under suitable conditions
Are formed into shape under heat and pressure and results in a permanently hard product

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