1. The ratio of linear stress to linear strain is called

- Modulus of elasticity
- Bulk modulus
- Rigidity modulus
- Poisson’s ratio

2. Young’s modulus of a perfectly rigid body is

- Unity
- Negative
- Infinity
- Zero
- A non-zero, finite constant

3. A rod of uniform cross-section A and length L is deformed by δ, when subjected to a normal force P. The Young’s Modulus E of the material is,

$\\a.\; E=\frac{P\delta }{AL}\\ b.\; E=\frac{A\delta }{PL}\\ c.\; E=\frac{PL}{A\delta}\\ d.\; E=\frac{AL}{P\delta}$

4. If material is heated up, its Elastic modulus

- decreases
- increases
- remains constant
- none of the above

5. Young’s Modulus is the ratio of the normal stress to the

- longitudinal stress within proportional limit
- longitudinal stress as yield point
- normal strain within elastic limit
- reciprocal of normal strain within elastic limit

6. A metal bar of 10 mm diameter when subjected to a pull of 23.5 kN gave an elongation of 0.3 mm on a gauge length of 200 mm. The Young’s modulus of elasticity of the metal will nearly be

- 200 kN/mm
^{2} - 300 kN/mm
^{2} - 360 kN/mm
^{2} - 400 kN/mm
^{2}

7. The ratio between tensile stress and tensile strain or compresive stress and compressive strain is termed as

- modulus of rigidity
- modulus of elasticity
- bulk modulus
- modulus of subgrade reaction

8. The relationship between Young’s modulus and shear modulus when (1/m) = 0, is

- E = 2G
- E = 3G
- E = 2G + 1
- G = 2E

9. Modulus of elasticity is

- Compressive stress/Tensile strain
- Tensile stress/Compressive stress
- Compressive stress/Compressive strain
- Tensile stress/ Compressive or tensile strain

10. The ratio of young’s modulus to the bulk modulus is

- More than one third
- Less than one third
- Less than one half
- None of the above

11. In a bar of length L, diameter D and cross-sectional area A, the strain produced is S under the action of load W. The Young’s modulus of elasticity for the wire is

- W/DLS
- WL/DS
- W/AS
- SDA/WL

12. The ratio of Young’s modulus of high tensile steel to that of mild steel is about

- 0.5
- 1.0
- 1.5
- 2.0

13. Two bars of same area and length but of different materials are subjected to same tensile force. If the bars have their axial elongation in the ratio of 4:6, then the ratio of modulus of elasticity of the two materials would be

- 4 : 6
- 6 : 4
- 2 : $\sqrt{6}$
- $\sqrt{6}$ : 2

14. Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 3:5, then the ratio of modulus of elasticity of the two materials will be

- 3:5
- 2:5
- 3:4
- 5:3

15. The modulus of elasticity of rolled structural mild steel is about

- 2 × 10
^{5}MPa - 2 × 10
^{6}MPa - 2 × 10
^{7}MPa - 2 × 10
^{8}MPa

16. The unit of modulus of elasticity is same as those of

- Stress, strain and pressure
- Stress, force and modulus of rigidity
- Stress, pressure and modulus of rigidity
- Strain, force & pressure

17. For a material, the modulus of Rigidity is 100 GPa and Poisson’s ratio is 0.25. The value of elastic modulus in GPa is

- 100
- 150
- 200
- 250

18. If Poisson’s ratio of a material is 0.5, then the elastic modulus for the material is

- Three times its shear modulus
- Four times its shear modulus
- Equal to its shear modulus
- Indeterminate