Engineering Materials
Points of arrest for iron correspond to

There is nothing like points of arrest
Stages at which allotropic forms change
Stages at which further heating does not increase temperature for some time
Stages at which properties do not change with increase in temperature

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Amorphous material is one

In which atoms align themselves in a geometric pattern upon solidification
Which emits fumes on melting
In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
Which is not attacked by phosphorous

ANSWER DOWNLOAD EXAMIANS APP

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 formed into shape under heat and pressure and results in a permanently hard product
Are flexible and can withstand considerable wear under suitable conditions
Are used as a friction lining for clutches and brakes

ANSWER DOWNLOAD EXAMIANS APP