21. If Poisson’s ratio of a material is 0.3, then the ratio of Young’s Modulus to bulk modulus is

- 1.4
- 1.2
- 0.8
- 0.6

22. When a body is elastically stretched, the value of Poisson’s ratio always remains

- greater than one
- less than one
- equal to one
- none of these

23. The bulk modulus of elasticity of a material is twice its modulus of rigidity. The Poisson’s ratio of the material is

- 2/7
- 1/7
- 4/7
- 3/7

24. For a material, the modulus of rigidity is 100 GPa and the modulus of elasticity is 250 GPa. The value of the Poisson’s ratio is

- 0.25
- 0.20
- 0.35
- 0.30

25. A bar specimen of 36 mm diameter is subjected to a pull of 90 kN during a tension test. The extension on a gauge length of 200 mm is measured to be 0.089 mm and the change in diameter to be 0.0046 mm. The Poisson’s ratio will be

- 0.287
- 0.265
- 0.253
- 0.241

26. For a given material the Poisson’s ratio is 0.25, the ratio of Young’s modulus and modulus of rigidity is

- 0.4
- 2.5
- 3.0
- 2.75

27. The maximum value of Poisson’s ratio for an elastic material is

- 0.5
- 0.25
- 1.0
- 0.75

28. In an experiment it is found that the bulk modulus of a material is equal to its shear modulus then the Poisson’s ratio is

- 0.125
- 0.250
- 0.375
- 0.500

29. The value of Poisson’s ratio of cork is approximately equal to

- 0.5
- 0.1
- 0
- 1

30. Poisson’s ratio of concrete is frequently taken as

- 0.5-0.75
- 0.15-0.25
- 0.05-0.15
- none of above