Which of the following statements are true? I. In the elastic region, the object

Question

Which of the following statements are true? I. In the elastic region, the object springs back to its original length when the stress is released. II. In the plastic region, the object no longer springs back to its original length when the stress is released. II. The maximum tensile stress that an object can withstand before failure is called the ultimate strength. a. None of the statements are true. b. I is true, while II and III are false. c. II is true, while I and III are false. d. III is true, while I and II are false. e. I and II are true, while III is false. f. I and III are true, while II is false. g. II and III are true, while I is false. h. All of the statements are true.

Explanation / Answer

First some theory :
Elastic Region: The region of the stress-strain curve in which the material returns to the undeformed state when applied forces are removed

PLastic Region: The region of the stress-strain curve in which the material doesn't returns to the undeformed state when applied forces are removed

Ultimate tensile strength (UTS), often shortened to tensile strength (TS) or ultimate strength, is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking. Tensile strength is distinct from compressive strength.

ANS :
h : all are true

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