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 formed into shape under heat and pressure and results in a permanently hard product
Are flexible and can withstand considerable wear under suitable conditions

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
The unit cells

Have the same orientation and their similar faces are parallel
Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
All of these
May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice

ANSWER DOWNLOAD EXAMIANS APP