9. The stress-strain curve of a ceramic is best described as: a. large engineeri

Question

9. The stress-strain curve of a ceramic is best described as:

a. large engineering tensile stress at low engineering tensile strain

b. small engineering tensile stress at low engineering tensile strain

c. large engineering tensile stress at large engineering tensile strain

d. small engineering tensile stress at large engineering tensile strain

10. The reason why grains grow during heat treatment is:

a. the overall energy of the system is decreased

b. the ductility is increased

c. the system has an entropy increase

d. the tensile strength is increased

11. What material is best suited to build a cylinder that will hold a noncorrosive gas at high pressure?

a. plastic

b. concrete

c. metal

d. rubber

12. During processing to make a fiber it is common to stretch a polymer while solidifying, this causes:

a. an increase in tensile strength

b. alignment of amorphous regions

c. alignment of crystalline regions

d. all the above

Explanation / Answer

9 . option b . Ceramics have high compressive stress but low tensile stress and low strain.

10. option a. the overall energy of the system is decreased

11. option c. high pressure means container should be high in tensile stress so Metal

12. option d

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