Which of the following statements regarding the mechanical properties of metals

Question

Which of the following statements regarding the mechanical properties of metals is correct? Stress is force divided by the original length Strain is deformation divided by the cross sectional area The stress at which a metal breaks under the tensile test is called yield strength The ratio of stress to strain in the linear portion of a stress-strain curve is called the elastic modulus Which of the following can be determined from an engineering stress-strain curve of a metal? Elastic modulus Melting temperature Crystal structure Grain size Which of the following about measuring the Poisson's ratio is correct? It is the ratio between stress and strain It is always negative It is always >1 for metals It is dimensionless

Explanation / Answer

Q1..d..stress to strain gives linear up to elastic limit

Q2..a.elastic modulus as from the graph stress vs strain gives the value as stress is proportional to strain

Q3..poisson=leteral strain/longtudnal strain. Which is dimensionless

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