1. Modulus of Rigidity is

- axial stress divided by axial strain
- shear stress divided by shear strain
- increase or decrease in volume divided by original volume
- direct stress divided by volumetric strain

2. Young’s modulus of elasticity and Poisson’s ratio of a material are 1.25 × 10^{5} MPa and 0.34 respectively. The modulus of rigidity of the material is

- 0.4025 × 10
^{5}MPa - 0.4664 × 10
^{5}MPa - 0.8375 × 10
^{5}MPa - 0.9469 × 10
^{5 }MPa

3. The ratio of Young’s modulus to modulus of rigidity for a material having Poisson’s ratio 0.2 is

- 12/5
- 5/12
- 5/14
- 14/5

4. Which of the following is the correct relation between the modulus of rigidity (C), Young’s modulus of elasticity (E) and bulk modulus (K)?

- E = (3CK)/(9K+C)
- C = (9EK)/(3K+E)
- K = (9EC)/(9C+E)
- E = (9CK)/(3K+C)

5. A material has a Young’s Modulus of 1.25 × 10^{5} N/mm^{2} and a Poisson’s ratio of 0.25. The Modulus of Rigidity is

- 0.65 × 10
^{5}N/mm^{2} - 0.60 × 10
^{5}N/mm^{2} - 0.45 × 10
^{5}N/mm^{2} - 0.50 × 10
^{5}N/mm^{2}

6. A bar 40 mm in diameter and subjected to a 40,000 kg undergoes elongation resulting in decrease in diameter considering the properties of the material as E = 2 × 10^{5} N/mm^{2} and Poisson’s ratio as 0.3, the modulus of rigidity will be

- 76923.07 N/mm
^{2} - 56898.50 N/mm
^{2} - 20 × 10
^{4}Kg/cm^{2} - 3 × 10
^{5}Kg/cm^{2}

7. The young’s modulus of a material is 150 GPa and Poisson’s ratio is 0.25, the modulus of rigidity of the material is

- 50 GPa
- 30 GPa
- 100 GPa
- 60 GPa

8. The ratio of modulus of rigidity and modulus of elasticity (G/E) for any elastic isotropic material is

- less than 1/2
- less than 1/3
- more than 1/3
- both (a) and (c)

9. The Poisson’s ratio of a material is 0.3 and Young’s modulus is 200 GPa. Its Rigidity Modulus is

- 77 GPa
- 51 GPa
- 125 GPa
- 333 GPa

10. Modulus of rigidity is the ratio of

- Linear stress to linear strain
- Linear stress to lateral stress
- Volumetric strain to linear strain
- Shear stress to shear strain

11. Modulus of Rigidity G can be expressed in usual notations as

- E/2(1+μ)
- E/2(1+2μ)
- 2E/2(1+μ)
- 2E/2(1-μ)