Question

Thermoplastic materials are those materials which

a.

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

b.

do not become hard with the application of heat and pressure and no chemical change occurs

c.

are flexible and can withstand considerable wear under suitable conditions

d.

are used as a friction lining for clutches and brakes

Posted under Mechanical Engineering

Answer: (b).do not become hard with the application of heat and pressure and no chemical change occurs

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Q. Thermoplastic materials are those materials which

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