Question 12. a Pointe) At elevated temperaturew a thermt eyt suitable for multip

Question

Question 12. a Pointe) At elevated temperaturew a thermt eyt suitable for multiple molding procese 1. a glass transition 2. an irreversible reaction (char, or burn for example) 3. all of the above 4. none of the above dokermation Question 13. (3 Points a rubber band) is called an elastomer. can undergo an exceptional amount of large eoatie 1. entangled monomer 2. isomer 3. chemically cross linked polymer 4. all of the above Question 14. (3 Points) In general are hard, brittle, and have high melting point 1. ceramics 2. metals 3. rubbers 4. all of the above Question 15. (3 Points) is about 1/3 the weight of steel, second to steel in quantity and use, and about 4-5 times the cost of steel. 1. Titanium 2. Aluminum 3. Bronze 4. Brass Question 16. (3 Points) Composite materials are typically 1. non-uniform solids consisting of metals and ceramics only 2. uniform solids consisting of a single phase 3. non-uniform solids consisting of two or more different materials 4. None of the above Question 17. (3 Points) Bulk forming processes involving_ above the recrystallization temperature considered hot working I. elastic deformation 2 plastic deformation 3. annealing 4 cutting

Explanation / Answer

12) thermoset plastics does not gets reshaped at elevated temperature. they are not reusable.

answer ..option 2..an irreversible reaction

13)elastomer is usually natural or synthetic polymers having elastic property.

so answer is ..option 3 , chemically cross linked polymer

14) in general ceramics are hard brittle and have very high melting point.

option 1

15) titenium

16) composite materials are typically materials made up of to or different materials ith significant physical and chemical property but hen combined produce a material different from individual component

so option 3

17) plastic deformation

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