# Interview Questions on Fluid mechanics

1. What is fluid mechanics and its applications?
2. Explain the difference between laminar and turbulent flow.
3. Describe the equation of continuity and its applications.
4. Explain the principle of Bernoulli’s equation and its applications.
5. What is hydraulic efficiency and what factors affect it?
6. What is cavitation and how does it occur?
7. How does the Reynolds number affect the flow regime of a fluid?
8. What is meant by the term “dimensional analysis” in fluid mechanics?
9. Describe the Navier-Stokes equation and its significance in fluid mechanics.
10. What is the purpose of using a pitot tube in fluid flow measurement?
11. Explain the concept of drag and lift forces in fluid mechanics.
12. What is a hydraulic jump and how does it occur?
13. What is the difference between steady and unsteady flow in fluid mechanics?
14. What are the different types of fluid flow (e.g. forced flow, free flow, etc.)?
15. What is the difference between incompressible and compressible fluid flow?
16. What is fluid mechanics and what are its applications?
17. What is the difference between a fluid and a solid?
18. Explain the concept of fluid statics and its applications.
19. Define and explain Bernoulli’s equation and its applications.
20. What is the continuity equation and how is it derived?
21. What are the types of fluid flow?
22. Explain the principle of hydraulic machines.
23. What are the dimensions of dynamic viscosity and kinematic viscosity?
24. What is the Reynolds number and its significance in fluid mechanics?
25. What is the difference between laminar and turbulent flow?
26. Explain the concept of boundary layer theory.
27. What is the difference between compressible and incompressible fluid flow?
28. What is the principle of pump and turbine operation?
29. What are the types of fluid-structure interaction and its importance in design?
30. What is the difference between open channel flow and pipe flow?
31. Define and explain the concept of pressure.
32. What are the units of pressure?
33. Explain the relationship between pressure and density.
34. What is the pressure at a point in a fluid at rest?
35. What is the equation of pressure in a fluid at rest?
36. What is Pascal’s law and its applications?
37. What is the concept of buoyancy and Archimedes’ principle?
38. What is the equation for the force of buoyancy?
39. What is the difference between subcritical and supercritical flow?
40. What is the principle of a venturi meter?
42. What is the principle of a pitot tube?
43. What is the concept of drag and lift?
44. What are the types of drag and lift forces?
45. What is the difference between drag and lift coefficients?
46. What is the difference between incompressible and compressible fluid flow?
47. What is the Mach number and its significance in fluid mechanics?
48. What is the difference between normal and oblique shock waves?
49. What is the principle of a shock tube?
50. What is the difference between choked flow and non-choked flow?
51. What is the principle of a diffuser?
52. What is the difference between axisymmetric and three-dimensional flow?
53. What is the principle of a cyclone separator?
54. What is the difference between turbulent and laminar flow?
55. What is the Reynolds number and its significance in fluid mechanics?
56. What is the principle of turbulence modeling?
57. What are the types of turbulence models?
58. What is the difference between Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES)?
59. What is the difference between direct and iterative numerical methods?
60. What is the principle of finite volume method (FVM)?
61. What is the principle of finite element method (FEM)?
62. What is the principle of boundary element method (BEM)?
63. What is the principle of particle-based methods?
64. What is the principle of mesh generation?
65. What is the difference between structured and unstructured grids?
66. What is the principle of grid adaptation?
67. What is the principle of grid independency?
69. What is the difference between laminar and turbulent flow?
70. What is the principle of turbulence modeling?
71. What is the difference between Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES)?
72. What is the principle of turbulence closure?
73. What is the difference between isotropic and anisotropic turbulence?
74. What is the principle of turbulence intensity?
75. What is the principle of turbulence Reynolds stress?
76. What is the principle of turbulence kinetic energy?
77. What is the difference between turbulence generation and turbulence decay?
78. What is the principle of turbulence production?
79. What is the principle of turbulence dissipation?
80. What is the principle of turbulence transfer?
81. What is the principle of turbulence injection?
82. What is the principle of turbulence mixing?
83. What is the principle of turbulence diffusion?
84. What is the principle of turbulence cascade?
85. What is the difference between turbulence