Question

The yield strength of a material is ___________

(a) the proof stress of a material

(b) the strain where the strength of material fails

(c) the elongation

(d) the particular stress where a material shows specified elongation under a load

I had been asked this question during a job interview.

The origin of the question is Aircraft Materials topic in portion Testing Aircraft Materials of Aerospace Materials & Processes

Answer 1

Right option is (d) the particular stress where a material shows specified elongation under a load

The best explanation: The yield strength of a material is the particular stress where a material shows specified elongation under a load. The elongation of a material is the change in length before being affected by stress to after.