1. The unit of stress in S.I. unit is ? N/mm² , KN/mm² , N/m²
2. The deformation per unit length is called ? Strain
3. The unit of strain is ? no unit
4. Strain is equal to ? ΔL/L
ΔL = change in length , L = original length
5. Which of the following is a proper sequence ?
Proportional Limit , elastic limit , yielding , failure
7. When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extends its length the stress and strain induced to ?
tensile stress , tensile strain
8. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section as a result of which the body tends to shear off across the section the stress and strain induced is ?
shear stress , shear strain
9. Hook's law holds good up to ? elastic limit
10. The ratio of linear stress to the linear strain is called ? modulus of elasticity
11. The unit of modulus of elasticity is same as those of ?
stress , pressure and modulus of rigidity
12. When a change in length takes place, the strain is known as ?
Linear strain
13. The modulus of elasticity for mild steel is approximately equal to ? 210 KN/mm²
14. Young's modulus may be defined as the ration of ?
Linear stress to linear strain
15. Modulus of rigidity may be defined as the ratio of ?
shear stress to shear strain
16. Strain rosetters are used to ? measure linear strain
17. When a bar is cooled to --5°C, it will develop ? tensile stress
18. Strain is defined as the ratio of ?
Change is volume to original volume
Change in length to original length
Change is cross-sectional area to original cross-sectional area
19. The materials having same elastic properties in all directions are called ?
Isotropic material
20. The impact strength of a material is an index of its ?
toughness
21. The intensity of stress which causes unit strain is called ?
modulus of rigidity
22. The value of Poisson's ratio for steel is between ?
0.24 to 0.33
23 . The buckling load for a given material depends on ?
slenderness ratio, area of cross-section and modulus of elasticity
24. The property of a material by virtue of which a body returns to its original shape after removal of the load is called ? Elasticity
25. The value of Poisson's ratio for cast iron is ?
0.23 to 0.33
26. The property of a material which allows it to be drawn into a smaller section is called ? Ductility
27. Poisson's ratio is defined as the ratio of ?
Lateral stress and longitudinal stress
28. The property of a material by virtue of which it can be between or rolled into plates is called ? Malleability
29. The stress developed in a material at breaking point in extension is called ?
Breaking stress
30. Flow stress corresponds to ?
Plastic deformation of solids
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