Elastic behaviour, stress strain relationship, Hookes law - One Line Questions

1. Which of the following represents the dimensional formula for stress? — [ML⁻¹T⁻²]
2. Which of the following represents the dimensional formula for strain? — [M⁰L⁰T⁰]
3. For most materials, the value of Poisson's ratio lies between: — 0 and 0.5
4. A spring obeys Hooke's Law. If the spring is stretched by 2 cm by a force of 10 N, what force is required to stretch it by 6 cm? — 30 N
5. Ultimate Tensile Strength (UTS) represents the maximum stress a material can withstand: — Before breaking
6. The relationship Y = Stress / Strain holds true only: — Within the elastic limit
7. Shear strain is defined as the ratio of: — Displacement parallel to the surface to the perpendicular distance
8. Strain is defined as the ratio of: — Change in length to original length
9. Tensile stress is a type of normal stress that tends to: — Stretch a body
10. A material is considered ductile if it can be drawn into wires. This property is related to its ability to: — Deform plastically without fracture
11. A material that breaks with little or no plastic deformation after the elastic limit is reached is called: — Brittle
12. The area under the entire stress-strain curve up to the fracture point represents: — Toughness
13. A stress-strain curve for a ductile material typically shows a region where strain increases significantly with little increase in stress. This region is known as: — Yielding
14. Which of the following statements about elasticity is incorrect? — All materials are perfectly elastic.
15. If a wire of length L and cross-sectional area A is stretched by a force F, the tensile stress is given by: — F/A
16. A material with a high Young's modulus is considered: — Stiff
17. Liquids are generally considered: — Incompressible
18. Poisson's ratio (σ) is the ratio of: — Lateral strain to longitudinal strain
19. Which type of strain is associated with shear stress? — Shear strain
20. The ratio of the change in diameter to the original diameter of a wire when stretched is called: — Lateral strain
21. A steel wire is much stiffer than a rubber cord. This means steel has a: — Higher Young's modulus
22. What is the SI unit of Young's modulus? — Pa
23. Which of the following is a unit of stress? — N/m²
24. Shear stress is produced when a force is applied: — Parallel to the surface
25. The phenomenon where a material returns to its original shape after the removal of deforming force is called: — Elasticity
26. What property of a material allows it to resist deformation under stress and return to its original shape after the stress is removed? — Elasticity
27. A negative sign is included in the definition of bulk modulus because: — Volume decreases with applied stress
28. If the stress applied to a material is doubled, and it remains within the elastic limit, the strain will: — Be doubled
29. The elastic limit is the maximum stress that a material can withstand beyond which it will: — Undergo permanent deformation
30. Which modulus of elasticity relates stress and strain for tensile or compressive forces? — Young's modulus
31. When a wire is stretched by a force, the stress experienced by the wire is: — Tensile stress
32. Which type of stress is produced when a force is applied perpendicular to the surface of a body? — Normal stress
33. Young's modulus (Y) is defined as: — Tensile stress / Linear strain
34. Bulk modulus (K) is defined as: — - (Volumetric stress) / Volumetric strain
35. Which of the following is a measure of the external force applied per unit area of a body? — Stress
36. The constant of proportionality between stress and strain within the elastic limit is called: — Modulus of Elasticity
37. Compressive stress is a type of normal stress that tends to: — Compress a body
38. Shear modulus (G) is defined as: — Shear stress / Shear strain
39. When a solid cube is subjected to uniform pressure from all sides, it experiences: — Volumetric stress and volumetric strain
40. The point on a stress-strain curve beyond which the material undergoes permanent deformation is called the: — Elastic limit
41. Hooke's Law states that within the elastic limit, stress is directly proportional to: — Strain
42. Which stress-strain relationship is parabolic? — In the plastic region for ductile materials
43. The area under the elastic portion of a stress-strain curve represents: — Resilience
44. The stress at which a material fractures is known as: — Fracture strength
45. The modulus of elasticity that relates shear stress to shear strain is called: — Shear modulus
46. The modulus of elasticity that relates volumetric stress to volumetric strain is called: — Bulk modulus
47. Which of the following is NOT a modulus of elasticity? — Poisson's Ratio
48. For a perfectly rigid body, which of the following is true? — Young's modulus is infinite
49. If a wire of original length L elongates by ΔL under a tensile stress, the tensile strain is: — ΔL/L
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