Strength of Materials

81. Which is the false statement about true stress-strain method

1. It does not exist
2. It is more sensitive to changes in both metallurgical and mechanical conditions
3. It gives, a more accurate picture of the ductility
4. It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.
5. It can be used for compression tests as well.

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82. Which of the following has no unit

1. kinematic viscosity
2. surface tension
3. bulk modulus
4. strain
5. elasticity.

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83. Which of the following materials is most elastic

1. rubber
2. plastic
3. brass
4. steel
5. glass.

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84. Young's modulus is defined as the ratio of

1. volumetric stress and volumetric strain
2. lateral stress and lateral strain
3. longitudinal stress and longitudinal strain
4. shear stress to shear strain
5. longitudinal stress and lateral strain.

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