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Mechanical Engineering - Engineering Materials - Discussion

Discussion Forum : Engineering Materials - Section 1 (Q.No. 2)
Engineering Materials
2.
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 flexible and can withstand considerable wear under suitable conditions
are used as a friction lining for clutches and brakes
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
14 comments Page 2 of 2.
Sachin said:   6 years ago
Different answers in the Nirali Prakashan book. Opn. A in answers. Which correct answer?
(1)
Hassanain Ali said:   4 years ago
Thermoplastic material is always cold.
Valusa Hrushikesh said:   3 years ago
Thermoplastic are softened on heating and hardened on cooling.
Abilash said:   6 months ago
Thermoplastics soften when heated and can be reshaped multiple times without undergoing a chemical change.

They solidify upon cooling but do not become permanently hard like thermosetting plastics.
(1)
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