Question

Which of the following is true regarding engineering stress-strain curve?

(a) it gives true indication of deformation characteristics of metal because it is entirely based on true dimensions of specimen

(b) it does not gives true indication of deformation characteristics of metal because it is entirely based on true dimensions of specimen

(c) it gives true indication of deformation characteristics of metal because it is not entirely based on true dimensions of specimen

(d) it does not gives true indication of deformation characteristics of metal because it is not entirely based on true dimensions of specimen

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Answer 1

Right option is (b) it does not gives true indication of deformation characteristics of metal because it is entirely based on true dimensions of specimen

Easiest explanation: The engineering stress-strain curve does not provide true indication of deformation characteristics of metal. It is entirely based on true dimensions of specimen and these dimensions change continuously as the load increases.