Mechanical Engineering - Engineering Materials - Discussion

2. 

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

Answer: Option B

Explanation:

No answer description available for this question.

Suresh.S said: (Oct 10, 2013)  
THERMOPLASTIC Material can be softened and re softened and reusable.

Rohit Singh said: (Dec 13, 2014)  
Because they are mostly chain structured polymers. On heating chain goes to extend.

Manan Joshi said: (Dec 17, 2014)  
Plastic becomes hard is thermo setting plastic.

Nikhil said: (Feb 2, 2015)  
Thermoplastic materials are those which becomes soft when it is heated and becomes hard when cooled.

Anurag Sharma said: (Aug 1, 2015)  
A thermoplastic is a material which becomes soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times. They can be recycled. When thermoplastics are heated, they melt to a liquid.

Raju Debsarma said: (Aug 11, 2016)  
What is clutch lining material?

Aji said: (Jul 6, 2017)  
Thermosetting plastics setting hard when heated.

Rajesh said: (Jul 22, 2017)  
Thermoplastic are those plastic which is recycle by application of pressure and heat or softened when heated or hardended by cooling.

Gokul said: (Jun 6, 2018)  
What is the difference of Thermosetting and thermoplastic?

Deven.U said: (Oct 23, 2018)  
They can be used again and again as they can be softened again and again.

Sachin said: (Oct 30, 2019)  
Different answers in the Nirali Prakashan book. Opn. A in answers. Which correct answer?

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