1. The ratio of change of dimension of the body to the original dimension is known

- Strain
- Stress
- Force
- Pressure

2. The ratio of axial deformation to the original length of the body is known as

- Lateral strain
- Linear stress
- Linear strain
- Poisson’s ratio

3. If longitudinal strain is tensile, the lateral strain will be

- tensile
- compressive
- zero
- not determined

4. The unit of strain is

- N-mm
- N/mm
- N/Sq.mm
- No unit

5. Shear strain γ_{yz} is given by

$\\a.\; \frac{\partial u}{\partial x}+\frac{\partial v}{\partial y}\\ b.\; \frac{\partial w}{\partial y}+\frac{\partial v}{\partial z}\\ c.\; \frac{\partial u}{\partial z}+\frac{\partial w}{\partial x}\\ d.\; \frac{\partial v}{\partial x}+\frac{\partial u}{\partial y}$

where u, v and w are the displacement vectors along x, y and z axis respectively.

6. A solid cube is subjected to equal normal forces on all its faces. Volumetric strain will be how many times of the linear strain.

- 2
- 1
- 3
- 4

7. Strain resisters are used to

- Measure shear strain
- Measure volumetric strain
- Measure linear strain
- Relieve strain

8. The ratio between the change in volume and original volume of the body is called

- tensile strain
- compressive strain
- volumetric strain
- shear strain

9. The shearing stress in a piece of structural steel is 100 MPa. If the elastic modulus is 200 GPa and the Poisson’s ratio is 0.25, then the shearing strain γ would be

- 0.8 rad
- 0.00125 rad
- 800
- 1.25

10. The material of a rubber balloon has Poison’s ratio of 0.5. If uniform pressure is applied to blow the balloon, the volumetric strain of the material will be

- 0.25
- 0.50
- 0.20
- 0.00

11. When the strain in a material increases with time under sustained constant stress, the phenomenon is known as

- hysteresis
- strain hardening
- visco-elasticity
- creep

12. The ratio of lateral strain to axial strain of a homogeneous material is known as

- Yield ratio
- Hooke’s ratio
- Poisson’s ratio
- Plastic ratio

13. A solid cube is subjected to equal normal forces on all its faces. The volumetric strain will be x-times the linear strain in any of the three axes when

- x = 2
- x = 1
- x = 3
- x = 4

14. How much (in %) fracture strain is commonly adopted as border between brittle and ductile materials?

- 3.5
- 7
- 4
- 5

15. A member with a cross-section of A and length L is subjected to a force of P. If Young’s Modulus is E, then linear strain will be

- PL/AE
- PA/LE
- P/AE
- PE/AL

16. Let the strains produced in length and diameter of the cylindrical rod be α and β respectively. Then the volumetric strain is given by

- α + 2β
- α + β
- α – β
- α – 2β

17. If a circular rod having Poisson’s ratio μ is subjected to an axial pull and if the strain is e, then the lateral strain is equal to

- -μe
- μe
- -e/μ
- e/μ

18. Volumetric strain of a sphere of diameter increasing from d_{1} to d_{2} is equal to

$\\a.\; \frac{d_{2}-d_{1}}{d_{1}}\\ b.\; 3\frac{d_{2}-d_{1}}{d_{1}}\\ c.\; \frac{d_{2}+d_{1}}{2d_{1}}\\ d.\; \frac{d_{2}+d_{1}}{2d_{1}}$

19. Let the strain produced in length and diameter of cylindrical rod be 0.02 and 0.005 respectively. Then the volumetric strain is given by

- 0.025
- 0.03
- 0.01
- 0.015

20. When a rectangular bar of length l, breadth b and thickness t is subjected to a pull of p, then volumetric strain is

- e(l – 2m)
- e(2m – l)
- e(l – 2/m)
- e(2/m – l)