Elasticity, Viscosity and Surface Tension - One Line Questions

1. What is the value of Poisson's ratio for an incompressible material? — 0.5
2. Which of the following is a consequence of surface tension? — Raindrops being spherical
3. The force of attraction between the molecules of the same substance is called: — Cohesion
4. Mercury in a glass tube typically shows a depressed meniscus because: — Cohesion forces are stronger than adhesion forces
5. The ability of a material to deform under tensile stress without fracturing is called: — Ductility
6. Which modulus of elasticity is defined as the ratio of tensile stress to tensile strain? — Young's Modulus
7. Which phenomenon explains why a needle can float on water if placed gently? — Surface tension
8. In a narrow glass tube, water rises due to: — Adhesion forces being stronger than cohesion forces
9. A perfectly elastic body would: — Regain its original shape instantly and completely
10. If the length of a wire is doubled, its resistance to stretching (within elastic limit) will: — Remain the same
11. Which property of a material allows it to deform permanently under stress? — Plasticity
12. The resistance of a fluid to deformation at a rapid rate is characteristic of: — Viscosity
13. Materials with a high Young's Modulus are considered: — Stiff
14. Stress is defined as: — Force per unit area
15. Strain is defined as: — Change in dimension per unit original dimension
16. Surface tension is defined as: — All of the above
17. Which type of fluid has zero viscosity? — Ideal fluid
18. Which factor generally increases the viscosity of liquids? — Decrease in temperature
19. What is the relationship between bulk modulus (K), Young's modulus (Y), and Poisson's ratio (σ)? — K = Y / (3(1-2σ))
20. What is the unit of kinematic viscosity? — m²/s
21. What is the SI unit of surface tension? — Newton per meter (N/m)
22. What is the unit of stress in the SI system? — Pascal (Pa)
23. What is the SI unit of Modulus of Elasticity? — Pascal (Pa)
24. Which of the following is NOT a unit of viscosity? — Stokes
25. What is the ability of a body to regain its original shape and size after the removal of the deforming force called? — Elasticity
26. What is the SI unit of dynamic viscosity? — Pascal-second (Pa·s)
27. The constant of proportionality between stress and strain within the elastic limit is called: — Modulus of Elasticity
28. Viscosity is a measure of a fluid's internal: — Resistance to flow
29. For a Newtonian fluid, the shear stress is directly proportional to the: — Rate of shear strain
30. What is kinematic viscosity? — Ratio of viscosity to density
31. For a given stress, a material with a lower Young's modulus will experience a: — Larger strain
32. Which of the following is a dimensionless quantity? — Strain
33. The strain energy stored per unit volume in a deformed elastic body is: — Proof Resilience
34. Hooke's Law states that within the elastic limit: — Stress is directly proportional to strain
35. A fluid's resistance to a shearing force is directly related to its: — Viscosity
36. How does temperature affect the surface tension of liquids? — Surface tension decreases with increasing temperature
37. What is the term for the maximum stress a material can withstand before it starts to deform permanently? — Elastic Limit
38. What is viscosity? — The tendency of a liquid to resist flow
39. Which property describes a material's ability to absorb energy when deformed elastically and release it upon unloading? — Resilience
40. The phenomenon of flow of a fluid in layers, without mixing, is called: — Laminar flow
41. Which property of liquids is responsible for the formation of spherical bubbles and droplets? — Surface Tension
42. The phenomenon where a liquid rises or falls in a narrow tube due to surface tension and adhesion is called: — Capillarity
43. How does temperature affect the viscosity of gases? — Viscosity increases with increasing temperature
44. Surface tension causes liquids to behave like a: — Stretched elastic membrane
45. Which is more viscous: honey or water? — Honey
46. The maximum stress a material can withstand before breaking is known as its: — Ultimate tensile strength
47. The ratio of shear stress to shear strain is called: — Modulus of Rigidity
48. Which modulus of elasticity is relevant for changes in volume due to pressure? — Bulk Modulus
49. The ratio of lateral strain to longitudinal strain, when a stress is applied along one direction, is known as: — Poisson's Ratio
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