### Few Questions of Fluid Mechanics

1. What are the SI & CGS units of viscosity & kinematic viscosity? What is the relation between the SI & CGS unit of viscosity? What is the value of viscosity of air & water at 288 K temperature? 2. (a) Define bulk modulus of elasticity without using any formula? (b) Bulk modulus of elasticity of water is 2000000 kN/m 2 . A pressure of 10 bar is applied on water having volume of 2m 3 . Find the change in volume of water in m 3 . 3. Find the flux of velocity having the components as 9x, -3y and 0 along the x, y and z axes respectively over the closed surface of the sphere given by x 2 + y 2 + z 2 = 9. 4. A flow field is given by u = ay, v = bz & w =cx . Determine whether the flow is rotational or irrorational. 5. The clearance space between a shaft and a concentric sleeve has been filled with a Newtonian fluid. The sleeve attains a speed of 600 mm/s when a force of 600N is applied to it parallel to the