Engineering Materials
Thermoplastic materials are those materials which

Are formed into shape under heat and pressure and results in a permanently hard product
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

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

Air is burning out silicon and manganese
The brown smoke does not occur during the operation of a Bessemer converter
The converter must be titled to remove the contents of the converter
Silicon and manganese has burnt and carbon has started oxidizing

ANSWER DOWNLOAD EXAMIANS APP