# Fluid Mechanics Viva Questions

- What is fluid mechanics?
- What is a fluid?
- What is the difference between a liquid and a gas?
- What are the properties of a fluid?
- What is viscosity?
- What is compressibility?
- What is bulk modulus?
- What is specific gravity?
- What is pressure?
- What is Pascal’s law?
- What is Archimedes’ principle?
- What is Bernoulli’s equation?
- What is the continuity equation?
- What is Reynolds number?
- What is the difference between laminar and turbulent flow?
- What is the boundary layer?
- What is the Navier-Stokes equation?
- What is the Euler equation?
- What is the difference between a streamline and a pathline?
- What is the concept of flow rate?
- What is the difference between a control volume and a control surface?
- What is the difference between steady and unsteady flow?
- What is a fluid particle?
- What is a stagnation point?
- What is the venturi effect?
- What is the Pitot tube?
- What is a hydraulic jump?
- What is cavitation?
- What is the difference between internal and external flow?
- What is the no-slip condition?
- What is a boundary condition?
- What is the difference between a streamline and a streakline?
- What is the difference between a fluid and a solid?
- What is a free surface?
- What is a meniscus?
- What is capillary action?
- What is the Laplace equation?
- What is the Laplace-Young equation?
- What is the Laplace-Young-Poisson equation?
- What is the equation of state?
- What is the ideal gas law?
- What is the compressible flow equation?
- What is a shock wave?
- What is the Mach number?
- What is the sound speed in a fluid?
- What is the critical Mach number?
- What is the choking condition?
- What is the isentropic flow equation?
- What is the mass flow rate?
- What is the momentum equation?
- What is the Bernoulli equation for incompressible flow?
- What is the energy equation?
- What is the power equation?
- What is the pump head?
- What is the efficiency of a pump?
- What is the lift force?
- What is the drag force?
- What is the buoyancy force?
- What is the weight of a fluid?
- What is the center of pressure?
- What is the Magnus effect?
- What is the boundary layer thickness?
- What is the boundary layer separation?
- What is the effect of turbulence on drag?
- What is the effect of roughness on drag?
- What is the effect of viscosity on drag?
- What is the effect of pressure on drag?
- What is the effect of Reynolds number on drag?
- What is the effect of Mach number on drag?
- What is the effect of angle of attack on lift and drag?
- What is the lift-to-drag ratio?
- What is the lift coefficient?
- What is the drag coefficient?
- What is the stall condition?
- What is the sweep angle?
- What is the aspect ratio?
- What is the wing loading?
- What is the induced drag?
- What is the parasitic drag?
- What is the interference drag?
- What is the thrust force?
- What is the propulsive efficiency?
- What is the specific thrust?
- What is the bypass ratio?
- What is the fan pressure ratio?
- What is the turbine inlet temperature?
- What is the exhaust gas temperature?
- What is the specific fuel consumption?
- What is the thrust specific fuel consumption?
- What is the propeller efficiency?
- What is the propeller pitch?
- What is the blade angle?
- What is the blade area?
- What is the blade aspect ratio?
- What is the blade loading?
- What is the blade lift coefficient?
- What is the blade drag coefficient?
- What is the blade efficiency?
- What is the blade tip speed?
- What is the slipstream?
- What is laminar sublayer?
- What is boundary layer displacement thickness?
- What is a Prandtl boundary layer?
- What is a Blasius boundary layer?
- What is a Falkner-Skan boundary layer?
- What is the Karman-Tsien compressibility correction factor?
- What is the Fanno flow?
- What is the Rayleigh flow?
- What is the shock polar?
- What is the method of characteristics?
- What is the method of finite differences?
- What is the method of finite volumes?
- What is the method of finite elements?
- What is the difference between Eulerian and Lagrangian approaches?
- What is the difference between explicit and implicit methods?
- What is the difference between steady and transient simulations?
- What is the difference between 2D and 3D simulations?
- What is the difference between structured and unstructured grids?
- What is the difference between uniform and non-uniform grids?
- What is the difference between Cartesian and curvilinear grids?
- What is the difference between structured and unstructured meshes?
- What is the difference between tetrahedral and hexahedral elements?
- What is the difference between triangular and quadrilateral elements?
- What is the difference between linear and quadratic elements?
- What is the difference between explicit and implicit time integration?
- What is the difference between first-order and second-order accuracy?
- What is the difference between upwind and central differencing?
- What is the difference between high-resolution and TVD schemes?
- What is the difference between steady-state and transient heat transfer?
- What is conduction heat transfer?
- What is convection heat transfer?
- What is radiation heat transfer?
- What is the Fourier law of heat conduction?
- What is the Newton law of cooling?
- What is the Stefan-Boltzmann law?
- What is the emissivity of a surface?
- What is the absorption coefficient of a medium?
- What is the scattering coefficient of a medium?
- What is the Planck’s law of blackbody radiation?
- What is the Wien’s displacement law?
- What is the Kirchhoff’s law of thermal radiation?
- What is the heat transfer coefficient?
- What is the Nusselt number?
- What is the Prandtl number?
- What is the Grashof number?
- What is the Reynolds analogy?
- What is the Colburn analogy?
- What is the mass transfer coefficient?
- What is the Sherwood number?
- What is the Schmidt number?
- What is the Lewis number?
- What is the Fick’s law of diffusion?